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The Department of Energy will hold public meetings to present the draft greenhouse gas emissions reduction strategy and to provide a channel for the public to provide comments to the Advisory Group on the draft strategy . World leaders assembled in Kyoto should heed this call to avoid rash and harmful action on greenhouse gas emissions . No one knows what will happen as a result of ozone depletion , the greenhouse effect and other environmental problems that cannot yet be foreseen . During 2000 , 81.2 percent of total U.S. greenhouse gas emissions consisted of carbon dioxide from the combustion of fossil fuels such as coal , petroleum , and natural gas . CDIAC 's data holdings , for example , include concentrations of greenhouse gases in the atmosphere and oceans , carbon storage in ecosystems , greenhouse gas emissions from industry and land use change , long-term global and regional climate , response of vegetation to elevated CO2 , tree ring data , and data on the vulnerability of coastal areas to rising sea level .