Global warming is caused by increased levels of pollution in the atmosphere and oceans, which has led to rising global temperatures each year. Air pollution, including gases and particulate matter from sources like vehicles and factories, contributes to global warming as primary and secondary pollutants. Various government agencies and policies at the federal, state, and local levels have been implemented to regulate emissions and reduce greenhouse gases in efforts to mitigate the effects of global warming.

1. Global Warming B-Lau

13. California Governor Arnold Schwarzenegger shaking hands with Assembly member Fran Pavley