the causes and effects of global warming
Global Warming Science and Impacts. The causes and consequences of rising global temperatures. The effects of rising temperatures are already being felt across the United States and around the world, with serious implications for our health, our environment, and our economy. Dangerous heat waves are increasing in frequency. Sea level rise is accelerating.
Cause of global warming. Almost 100% of the observed temperature increase over the last 50 years has been due to the increase in the atmosphere of greenhouse gas concentrations like water vapour, carbon dioxide (CO2), methane and ozone. Greenhouse gases are those gases that contribute to the greenhouse effect (see below).