Global Warming: Current
Preventive Measures
By Daniel Pyo
In 1994 alone, the United
States emitted about one-fifth of the total global greenhouse gases (Parsons,
14). Scientists predict that, if
preventive action is not taken soon, the US' percentage contribution to this will
remain fairly constant, if not greater.
Normally twenty per cent wouldn't attract a lot of attention if it
resulted from a group of nations, but because it comes from the US alone, many
question the legitimacy of the effective policies and regulations concerning
this issue in the United States. The
focus of this paper is to delve into the particular preventive measures, or
those being discussed by individual states within the US. Ultimately, states are responsible for
identifying, and consequently implementing, feasible and effective policies to
reduce greenhouse gas emissions in their respective state. In the end, most of the preventive
strategies are fundamentally similar, although some need specific tailoring
depending on the state. By taking a
proactive approach to this problem, states serve as an example to both their
constituents and to other states as well.
Until recently, we as a
global society have passively succumbed to the environmentally detrimental
phenomenon today regarded as global warming since the Industrial Revolution in England
during the 18th and 19th centuries. Not
an active choice, but rather the consequence of inevitable technological
progress and man's assiduous pursuit of economic growth, global warming is the
price we, as global citizens, must pay for a modem industrialized society. Fortunately, this same forward progress has
provided modern day scientists with both the scientific knowledge and means to
detect such a problem, although it comes much later than the advent of
industry. Unless slowed or halted completely,
global warming poses a serious threat to the sustainability of life, as
we know it on earth in the
future. Thus the burning question
remains as to what actions must be taken today, or in the very near future to
prevent such a dismal catastrophe.
Before discussing the
possible solutions to this problem, it will undoubtedly prove worthwhile to
briefly summarize the global warming phenomenon (greenhouse effect) to acquaint
the reader with the scientific jargon and references that will be referred to later. Energy from the sun drives the earth's
weather and climate, and heats the earth's surface; in turn, the earth radiates
energy (heat) back into space. However,
atmospheric greenhouse gases trap some of the outgoing energy, retaining heat
somewhat like the glass panels of a greenhouse. Because of this, the earth's climate is predicted to change
because human activities are altering the chemical composition of the
atmosphere through the buildup of these greenhouse gases - primarily carbon
dioxide, methane and nitrous oxide. The
heat-trapping property of these gases is undisputed (Verlag, 23). Thus as society continues to produce more
and more energy through conventional means, it actively emits more and more of
these greenhouse gases. The result is
an increase in the earth's atmospheric temperature by several degrees even
within the next century; this will result in drier soil world-wide, ultimately
raising the sea as glaciers melt. This
change in climate threatens future inhabitants of earth with unpredictable
weather patterns, more intense rain storms, less agriculturally productive
soil, and even loss of land-the areas surrounded by water (Read, 28).
It is a well-known
scientific fact that greenhouse gas concentrations are increasing. Scientists attribute this primarily to the
combustion of fossil fuels and other human activities (EPA web site). Many Americans wonder why this continues in
light of its harmful impact on the atmosphere; however, they concurrently fail
to realize that it is indeed their burning of energy to run cars and trucks,
heat homes and businesses, and power factories that is responsible for about
80% of US carbon dioxide emissions, about 25% of US methane emissions and about
20% of nitrous oxide emissions (Parsons, 48).
Ironically enough, American society has grown so dependent upon industry
as a normal part of everyday life that it is very difficult to imagine life
without it, despite the fact that the successful future of the earth hinges
upon its ability to curtail these emissions.
Thus they find themselves searching desperately for innovative and more
efficient sources of energy which conform to current lifestyle.
Energy consumer approaches
to reducing greenhouse gas emissions take shape in the form of demand-side
management (DSM), improvement upon the efficiency with which energy is used, or
alteration of the energy source to provide services. DSM, commonly called energy conservation, focuses mainly upon
getting end-users to consume less energy.
Energy-efficiency options, on the other hand, achieve the same level of
output or activity while using less energy, often through improved
technology. A more efficient furnace,
for example, may allow a household to maintain the same or higher indoor
temperature while using less fuel. In
this sense, DSM can be considered a general blanket that includes improved
energy efficiency because it does indeed directly relate to the reduction of
energy consumption. Altering the energy
supply is perhaps the most difficult approach to global warming because it is
so easy to burn traditional fossil fuels, and also because it is fairly cheap
to do so. The rationale for this focus
on energy reduction, efficiency, and alteration lies in the argument that the
less energy produced, the less atmospheric greenhouse gases emitted.
Aggregate energy consumption
is the product of millions of individual decisions on the type and level of
energy service desired, the types of equipment and fuel to provide it, the
types of buildings in which we live and work, and the kinds of commercial
services and manufactured products we buy.
This includes for example, the amount of energy used to produce heat,
light, hot water, or manufactured products.
Because of this, demand-side management usually requires a reorientation
of business practices and lifestyles, such as using different transportation
networks, more efficient electrical products, or non-traditional energy saving
tactics. The basic demand-side
management programs begin with building or business audits to identify
potential energy savings. This is most
often done by setting up a climate change task force that brings together
relevant experts (state planners, environmentalists, natural resource
specialists, analysts) to assess the structures or processes involved (G.W.I.
web site). After gauging these
potential savings, DSM compares the figures with current energy consumption
rates and rewards performance based rebates paid on a per-kilowatt-conserved
basis. Furthermore, DSM coalesces with
utility companies to negotiate technology-based rebates for specific
energy-efficiency measures such as compact fluorescent lights and occupant
sensing light switches. It is also
common to find DSM programs sponsoring reduced interest financing for
energy-efficiency investments. The
purpose is to encourage new companies, businesses, residences or industries to
incorporate measures that reduce the overall consumption of energy as they
develop in their incipient stages, so as to inculcate this theme throughout the
remainder of its existence. States
including North Carolina, Louisiana and New York have already adapted this
tactic (Read, 189).
The improvement of energy
efficiency can be further divided along three lines: building measures
(building shells); equipment improvements; and process changes. Approaches to improve the efficiency of
building shells markedly reduce the heating and cooling requirements and
include a wide range of building design, construction, landscaping. Currently many states in the US capitalize
on better insulation technique that includes the strategic placement of a
revolutionized insulating material.
This material is reported to sustain heat within buildings one and a
half times more efficiently than those that were used up until about 15 years
ago (Verlag, 189). As of recently, many
states have put in a joint effort to subsidize technological companies studying
glass window pain technology that allows greater amount of heat retention on
cloudy, overcast days by allowing more sunlight penetration than normal. Apparently, these same company's have put
forth much less effort on sunny day situations because of the existent
self-tinting window technology. Modern
civil engineers who are familiar with the technical and economic issues
surrounding energy efficiency now carefully take into consideration the
advantages of using the sun for heating, and emphasize minimizing the
north-facing window pains, which undoubtedly receive the least amount of
sunlight. Until the recent development
of voluntary groups such as the American Society of Heating, Refrigerating and
Air Conditioning Engineers (ASHRAE), building planners took for granted the
sun's natural and free resource of heat as a contributing factor to building
shell design (Read, 238). Similar
effort is being put forth into the interior design of these buildings. For example, ASHRAE emphasizes minimizing
ventilation energy requirements by designing cubicles and floor plan layouts
that are more conducive to cross air-flow.
Furthermore, these innovative building shells now include less energy requiring
fluorescent light bulbs along with motion sensitive lights which guarantee
their usage only when necessary, thus eliminating the wasting energy phenomenon
(EPA web site). Additionally, a series
of model building codes produced periodically by the Council of American
Building Officials provides guidance for state and local governments on
energy-efficiency measures.
While many building shell
approaches are practical only during the design and construction of new
buildings, significant energy savings are available through shell retrofit
measures designed to reduce infiltration and heat loss. As mentioned earlier, numerous states reward
those existing companies that emulate these new energy saving techniques to the
best of their ability in the form of rebates, tax credits or even lower
interest rates for loans on new capital.
For example, the State of Oregon offers 35 percent Business Energy Tax
Credit and a Small Scale Energy Loan Program The Indiana State Energy Off-ice
supports similar programs through innovative public and private partnerships
(Read, 164).
Replacing existing
energy-using equipment with more efficient technologies is the second approach
to reducing greenhouse gas emissions.
These new equipment or device measures are available for every energy
end-use at efficiencies substantially above current levels. Unfortunately, technical, operational and
economic barriers limit the applicability of energy efficient equipment in any
given case. In other words, the output
rate of energy efficient devices is constrained by the current technology,
which itself is governed by economic and scientific constraints beyond its
control. Because states recognize this
potential barricade, many states, including Colorado and Louisiana are lobbying
for the federal government to subsidize scientific research in this area
(Verlag, 218). Yet, as will be
discussed later, progress on this matter is slow. Local state governments, however, currently provide financial
incentives for accelerating equipment replacement rates through tax credits or
low interest loans on efficiency improving replacements, by taxing inefficient
appliances and outdated equipment.
Furthermore, states work with utility company's to sponsor rebate
programs that induce consumers to purchase more efficient products. For example, the Bonneville Power
Administration in the Pacific Northwest is currently working with its
industrial customers to encourage energy conservation efficient equipment
rebate programs. This has proven to be
highly successful, having consistently met or exceeded the Power
Administration's goals (EPA web site).
Perhaps the most difficult
approach to this problem is the attempt to substitute or alter the current
energy sources, which supply consumers with end-use services such as
electricity, heating, and air conditioning.
Most commonly known as fuel switching, the substitution of one energy
source for another is an effective way to reduce greenhouse gas emissions. This can occur at sites that provide power,
such as large electricity generating stations, or on a much smaller scale at
home. Substituting electricity with gas
to heat water, for example, can lead to a reduction in power plant fuel
consumption and emissions. In fact,
replacing current gas technologies with very efficient electro-technologies can
produce net system reductions in energy use and emissions, even after
accounting for the losses in the generation and transmission of
electricity. As with most things that
seem too good to be true, there is a catch.
Although using electricity to heat water is much friendlier to the
environment, it is not necessarily the most cost-effective approach to doing
so. In truth, this is what most corporations
strive for in their daily activities, and thus the minority of the time, saving
money is a higher priority even if the opportunity cost harms the environment.
There are also simple,
non-tcchnology-bascd programs addressing this problem as well. The most prominent strategy is the promotion
of urban tree planning. During the
summer, the shade from trees protects homes and businesses from the sun's heat,
and during the winter, the structural integrity of trees slow cold winds. In both cases, the presence of trees offers
marginal help to reduce the need for heating/air conditioning and thus energy
consumption. In addition, collective
tree planting provides indirect carbon reduction benefits; evapotranspiration -
the process by which plants release water vapor into warm air - from trees and
shrubs can reduce ambient temperatures and energy use for entire neighborhoods
during the hot summer months. Urban
tree planting can also generate direct carbon benefits. Because half the dry weight of wood is
carbon, as trees add mass to trunks, limbs and roots, carbon is stored in
relatively long-lived structures instead of being released to the atmosphere. Currently, the Sacramento Municipal Utility
District in California contributes over a million dollars annually to the
Sacramento Tree Foundation for tree planting activities. Similar programs, such as Cool Communities,
pervade the nation on a national level (EPA web site).
Up until this point, all the preventive measures discussed tend
to focus on the activities of the consumers', perhaps misleading the reader to
believe that they are the sole bearers of guilt. In fact the suppliers of this energy are just as much at
fault. More specifically, the companies
that generate electricity provide utilities and power to consumers. Several federal statutes affect the level of
greenhouse gas emissions from electricity production including the Public
Utilities Regulatory Policy Act (PURPA) and the Public Utilities Holding
Company Act (PUHCA). Under PURPA, state
governments encourage transition to modes of power production that result in
lower greenhouse gas emissions, including use of renewable fuel sources (Krause
and Koomey, A.10.10.24). States can also affect emissions in the power supply
sector through their jurisdiction pertaining to environmental protection, as
well as through regulation of power plant citing and certification.
Currently, the most effort
is being placed into means of reducing greenhouse gas emissions on the supply
side comes from utilizing the most innovative technology to achieve maximum
efficiency of electricity generation.
States actively follow up on this measure by issuing emissions
permits/budgets. This creates the
incentive for companies to be more efficient because these permits are trade-able
which means that if a company emits less than its emission budget, it can sell
those rights to another company that may be less efficient and thus in need of
a larger budget (Larsen and Shaw, 845).
This program epitomizes the idea of efficiency by creating somewhat of a
competition between companies.
In the near term, the
greatest opportunities for reducing emissions are likely to involve natural
gas, the fossil fuel with the lowest carbon content per unit of energy. A recent study, An Alternative Energy
Future, (G.W.I. web site) says "the rapid deployment of new technologies
could result in a stabilization of total U.S. energy consumption over the next
20 years, with a corresponding shift away from high-carbon fuels to natural gas,
renewable energies and higher-efficiency equipment." The joint study,
sponsored by the Alliance to Save Energy, the Solar Energy Industries
Association and the American Gas Association, says such a scenario will result
in a 12 percent reduction in carbon dioxide emissions from 1990 to 2010.
In recent years, PURPA and
other related organizations have sponsored transition away from high carbon
generating technologies and fuels.
Unfortunately, many constraints inhibit effective, large-scale,
non-carbon alternatives. Hydroelectric
power development, for example, is often limited by environmental concerns such
as ecosystem damage through flooding and disruption of water supplies, and
nuclear power production is constrained by public safety and environmental
concerns, as well as the cost of nuclear units and perceived financial risks
(Parsons, 116). No nuclear power plants
have been commissioned in the US for many years.
More practical, alternative
energy sources consist of non-fossil fuel based power generating technologies
and processes, including re-usage of waste heat, methane from non-traditional
sources, wind, geothermal heat and pressure, solar thermal processes, and tidal
currents. For instance, the
physiological conditions created by the nations wetlands and landfills produce
a lot of "free" methane. Only
recently has the importance of capturing this energy source and converting it
to societies needs been considered and even implemented. Today, there are numerous methane extraction
facilities in the US. Similarly, it is
not uncommon to find large windmills located throughout the
southern/mid-western regions of the US.
Although not a huge source of energy, windmill electricity generation is
constantly tinder research and development to improve efficiency and productivity. These aforementioned methodologies are
fairly consistent with solutions to demand side measures; they focus on
capturing much of the "free" energy emitted in the universe around
us. Initial installation costs can
create constraints and vary significantly among sources; in many cases these
costs limit the ability to compete with fossil fuels. Yet there is hope as research and development on these
technologies slowly, but surely increases their cost-effectiveness.
Perhaps the single largest
contributor of greenhouse gas emissions (carbon dioxide/monoxide), the
transportation sector of society has become so firmly ingrained into society's
standard of transportation, it is very difficult to reverse the process. Most attempts to reduce emissions either aim
to increase the fuel efficiency of automobile engines or encourage mass transit
transportation or carpooling. The
former strategy is inevitably constrained by the limitations of technology, yet
much research is under way. The most
effective means of curtailing emissions in this sector comes from the promotion
of alternative methods of transportation.
For example many states, with the help of large corporations are
currently entertaining the development of urban light rail systems (people
movers) to promote carpooling.
Furthermore, states plan to improve and extend existing railways for
longer distance travel (EPA web site).
As with any other modification to society considered
somewhat of an inconvenience, there are incentives to encourage people to
partake. Not all, but many states offer
financial incentives (tax break or low interest loans) for businesses to
initiate car and van pools that lessen the individual number of cars on the
road. Furthermore, states encourage the
alteration or staggering of work schedules so as to decrease rush hour traffic
thus decreasing the overall number of hours cars spend on the road each
day. California’s widespread usage of
the carpool lane, which allows only those cars with two or more passengers to
use them, is also another incentive for people to ride-share. Similarly, the Connecticut Department of
Transportation has helped to establish nearly 12,000 car pools and 180 van
pools since 1980, saving an estimated nine million gallons of gasoline yearly,
not to mention the tremendous savings in carbon dioxide emissions. This practice is getting more and more
popular among other states as well (Read, 303).
There are also disincentives
to transportation consumers, or everyday people who drive. These include tolls on heavily traveled
roads during peak hours, higher automobile registration and licensing fees, and
increased gasoline and road taxes. The
rationale behind this is that people will revert to other forms of
transportation such as mass transit, bicycling or walking in place of
driving. Furthermore, US law mandates
that every car be smog tested annually in order to regulate automobile
efficiency. In some extreme cases, some
areas such as North Virginia and Southern California have implemented programs
to retire older automobiles (EPA web site).
Despite the positive results
stemming from these programs, DSM around the country have often been slow to
take hold as an effective mechanism for helping regions curtail energy
usage. With regard to the improving energy
efficiency and replacing inefficient equipment, the truth is that a relatively
long time period is usually required for the replacement of industrial
equipment. Most energy-intensive
industrial processes are capital-intensive and the rate of equipment turnover
is often measured in decades.
Additionally, the diversity of technologies and processes utilized in
these sectors are markedly different enough
that one type of efficient technology doesn't necessarily apply to the
next. In the residential sector, most
homes in the US already have water heaters, refrigerators, electric lights, and
central heating/air conditioning. And
like industrial equipment, the replacement rate depends on the installed
appliances expected lifetimes, which can range from five to twenty five years
or more (G.W.I. web site).
Usually, the basic incentive
to upgrade the level of energy efficiency in a building is to save money. However, two distinct disincentives often
inhibit these upgrades from happening: higher costs and lack of information. Many energy efficient technologies have
higher up-front costs than the standard technologies they could replace. For example, although fluorescent light
bulbs are more expensive than standard incandescent bulbs, they ultimately pay
for themselves because they require much less electricity (Parsons, 87). Because many people lack this knowledge,
they opt not to convert because of high initial costs and the relative in-expensiveness
of current electricity rates.
Despite these minor setbacks
and temporary barriers in the road, it is likely that in the future, global
warming will hardly warrant a moments worry.
All states within the US recognize the scope of global warming's threat
to future society, and thus we now proactively plan and implement measures to
prevent or curtail further emissions of greenhouse gases. This marks a tremendous first step to a
monumental movement in terms of energy consumption, efficiency and
production. Although the battle ahead
seems long and debilitating we must rely on our current strategies and support
the research and development of new ones in this ever-changing situation. This effort requires much time, effort, patience
and coalescence amongst the global community.
The future looks somewhat brighter knowing that these initiatives are
currently in process, or in midst of discussion. We have taken the first step of many, knowing one thing for sure:
we are indeed headed in the right direction.
Bibliography
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Greenhouse.
California: International Project for Sustainable
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2. Larsen, Bjorn and Anwar Shah.
"Global Tradable Carbon Permits, Participation Incentives and
Transfers." Oxford Economic Papers Vol. 46 (1994) 841-856
3. Parsons, Michael L. Global Warming. New York: Plenum Press, 1995.
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to Global Warming. New Jersey:
Biddles Ltd., 1994.
5. Verlag, Economica. Protecting
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Feb. 16 1999. www.epa.org.
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