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<< Back to Climate Change/Global Warming page • Article 1 "Climate, Energy, and Earth Process" • Article 3 "The Dark Side of Our Dependence on Fossil Fuels" |
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Other Areas Being Explored: Climate Change / Global Warming |
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Global Warming and Public Policy The earth's climate system is exceedingly complex. Determining global temperature and sea level is not a simple matter. Determining how one factor affects others is more difficult and subject to differing standards of evidence and interpretation. Predicting what will happen in the future is even more complex and basically not possible. This is partly because predictable changes will have unpredictable effects. For example, higher air temperatures will lead to more clouds, but it is not possible to know in advance if more clouds, which both reflect light and trap heat, will hasten or slow the warming trend. The biggest uncertainty is not knowing about consequences of future human activity. The International Panel on Climate Change (IPCC) makes its projections in numerical ranges because areas of known uncertainties make more specific predictions unwarranted. A number of large corporations have opposed the conclusions of the IPCC as “unscientific,” and have helped fund and publicize the work of a very few scientists who challenge its findings. News reports that present "both sides" make it seem as though there is much more disagreement among climate scientists than really exists. What has happened about global warming in international diplomacy? A UN Framework Convention on Climate Change was adopted by more than 160 nations at the Rio Earth Summit in 1992. It set a goal of stabilizing global temperature and provides for annual conferences to negotiate agreements until this goal is reached. The United States President signed and the Senate ratified the Framework Convention in 1993. At the 1997 conference in Soon after taking office President George W. Bush stated his opposition to the Kyoto Protocol on the grounds that it could hinder the Can the Kyoto Protocol work if the developing countries don't participate? Opponents of the What is happening in national policy and politics? In 1997, before the Soon after taking office, President George W. Bush reversed a campaign pledge to begin limiting CO2 emissions from coal plants. In the spring of 2001, the President released his energy plan, which focuses on increased production of fossil fuels and a renewed commitment to nuclear power. The plan largely disregards energy conservation and offers little support to promote energy efficiency and renewable technologies. It has been estimated that Bush administration’s proposals would result in an increase in Acting on this pressing issue until reducing greenhouse emissions becomes a priority of What are the alternatives to our present energy system? An essential first step is to replace less efficient equipment and technologies now in use with more efficient equipment and technologies that are already available. Natural gas is less polluting as a fuel than coal or oil, but it still adds both CO2 and methane to the atmosphere. Nuclear power is not a direct cause of greenhouse emissions, but the problems and risks of radioactive contamination are incompatible with caring for the earth as a sacred trust. Nuclear fuel is scarce and expensive. It provides a low net gain of energy which is masked by subsidies. Both natural gas and nuclear power may help make a transition away from our present system, but neither is ecologically sustainable. Wind turbines already produce electricity at a cost that is competitive with fossil fuels. Photovoltaic (solar) cells already produce electricity directly from sunlight and would be much more widely used when the cost of using fossil fuels increases. Fuel cells are being developed to produce electricity without combustion, using hydrogen as a fuel. Hydrogen can also be used in a combustion engine with only water as an exhaust, and electricity from solar, wind or other renewable sources can generate hydrogen. Many people are coming to think a solar/hydrogen energy system can be a solution to our present dilemma. Public policy decisions are needed to hasten the development of a practical energy system based on renewable sources. Hydrogen is not a source of energy. However, any energy technology used on a large scale will disrupt natural eco-systems. The more population and affluence increase, the more disruptive human impacts will become. Creating a culture in which all people can find fulfillment using less energy and fewer of the earth's physical resources is both possible and essential for sustainability. Would complying with the Kyoto Protocol cost jobs and hurt the economy? Predictions by critics of the Kyoto Protocol that it would destroy the However, the To whom much has been given, much will be required.
<< Back to Climate Change/Global Warming page • Article 1 "Global Warming, Climate Change, and Earth Process" • Article 3 "The Dark Side of Our Dependence on Fossil Fuels" |
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