| | Climate Change Encyclopedia Article, Information, History and Biography @ NaturalResearch.org (Site not responding. Last check: 2007-09-20) |
 | | In recent usage, especially in the context of environmental policy, the term "climate change" is often used to refer only to the ongoing changes in modern climate, including the average rise in surface temperature known as global warming. |
 | | However there are several examples of rapid changes in the concentrations of greenhouse gases in the Earth's atmosphere that do appear to correlate to strong warming, including the Paleocene-Eocene thermal maximum, the Permian-Triassic extinction event, and the end of the Varangian snowball earth event. |
 | | Changes in sea levels are indicators of climate change - the volume of the sea water changes as it warms/cools. |
| www.naturalresearch.org /encyclopedia/Climate_change (2629 words) |