There is a broad consensus among scientists that climate change is occurring, the consequences are significant, and that most of the recent warming can be attributed to human activities. In June 2005, the national scientific academies of 11 nations issued a joint statement that said, "The scientific understanding of climate change is now sufficiently clear to justify nations taking prompt action" to reduce global warming emissions.

IPCC Report: Climate Change 2007: The Physical Science Basis: Summary for Policymakers

	Climate Ark: Climate Change News Portal
	Stern Review on the economics of climate change
	Climate Change in the US Northeast
	The World in 2050: Implications of global growth for carbon emissions and climate change policy (PricewaterhouseCoopers)
	National Academies: Surface Temperature Reconstructions for the Last 2,000 years
	Impacts of Ocean Acidification on Coral Reefs and Other Marine Calcifiers
	Climate Change Post 2100: What are the Implications of Continued Greenhouse Gas Buildup?

Good Graphical Overviews of Climate Change:

U.N. Environmental Program's Vital Climate Graphics and Vital Climate Graphics Update

National Academy of Sciences

Woods Hole Research Center's Warming of the Earth

Governments Respond to Climate Change:

Kyoto Protocol: 155 countries have ratified this agreement which limits carbon emissions from 35 industrialized nations. The agreement took effect in February, 2005.

U.S. Congressional Action:
Senate Cap and Trade Proposals

The States and Cities Move Forward:
States with Climate Change Action Plans	State Climate Change Action Plans California's Climate Change Initiatives State and Local Emission Reductions Actions State and Local Climate Action News
States with Greenhouse Gas Inventories Source: Pew Center

U.S. Mayors Climate Protection Agreement: 710 mayors have agreed to Kyoto targets to reduce greenhouse gas emissions.

Climate Changes in the 21st Century:

A collection (see below) of historical climate and future climate projections produced by the National Center for Atmospheric Research (NCAR) for the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report now available from EOS-WEBSTER.

Maps!

• Newcomer's Guide to Ordering Data from EOS-WEBSTER
  
• Detailed Information about the Climate Changes in the 21st Century Data Collection
  
• Order the NCAR/IPCC 4th Assessment Report Climate Change Data

• Dr. Hansen's Home Page
  
• Swift Boating, Stealth Budgeting, Unitary Executives

How will our changing climate affect ecosystems, human health, agriculture and economic growth?

Explore These Issues in Greater Detail:

Additional Resources:

Human Fingerprints on Global Warming

Past, Present, and Future Temperatures: the "Hockey Stick"

Hurricane Destructiveness in a Warmer World