In the past, changes in the composition of the atmosphere have been a major cause of climate differences. Already, observations of the global climate indicate that average temperatures are starting to warm, most likely because of increasing concentrations of greenhouse gases (especially carbon dioxide) in spite of the apparent cooling influence of the increased concentration of sulfate aerosols, primarily from sulfur dioxide emissions.
The US Global Change Research
Program supported a major portion of
climate change research, the results of which
have been endorsed by the international
scientific community and summarized in
scientific assessments by the IPCC.
Environment and Natural Resources - Table of Contents
Research Successes - Ecosystem Research
Research Successes - Observation & Data Management
Research Successes - Biodiversity
Research Successes - Environmental Technology
Research Successes - Global Change
Research Successes - Natural Disaster Reduction
Research Successes - Environmental Change
Research Successes - Forest Research
Research Successes - Air Quality
Research Successes - Lead Levels
Research Successes - Science Policy Tools
Research Successes - Water Resources
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