Contents [hide]
1 Observed temperature changes
1.1 Trends
1.2 Warmest years
2 Initial causes of temperature changes (external forcings)
2.1 Greenhouse gases
2.2 Aerosols and soot
2.3 Solar activity
2.4 Variations in Earth's orbit
3 Feedback
4 Climate models
5 Observed and expected environmental effects
5.1 Extreme weather
5.2 Sea level rise
5.3 Ecological systems
5.4 Long-term effects
5.5 Large-scale and abrupt impacts
6 Observed and expected effects on social systems
6.1 Habitat inundation
6.2 Economy
6.3 Infrastructure
7 Possible responses to global warming
7.1 Mitigation
7.2 Adaptation
7.3 Climate engineering
8 Discourse about global warming
8.1 Political discussion
8.2 Scientific discussion
8.3 Discussion by the public and in popular media
8.3.1 Surveys of public opinion
9 Etymology
10 See also
11 Notes
12 Citations
13 References
14 Further reading
15 External links