Global warming is the increase in the average temperature of the Earth

Global warming is the increase in the average temperature of the Earth

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Global warming is the increase in the average temperature of the Earth's near-surface air and oceans since the mid-twentieth century, and its projected continuation. The average global air temperature near the Earth's surface increased 0.74 ± 0.18 ° C (1.33 ± 0.32 ° F ) during the hundred years ending in 2005. [1] The Intergovernmental Panel on Climate Change (IPCC) concludes "most of the observed increase in globally averaged temperatures since the mid-twentieth century is very likely due to the observed increase in anthropogenic (man-made) greenhouse gas concentrations" [1] via the greenhouse effect . Natural phenomena such as solar variation combined with volcanoes probably had a small warming effect from pre-industrial times to 1950 and a small cooling effect from 1950 onward. [2] [3] These basic conclusions have been endorsed by at least thirty scientific societies and academies of science , [4] including all of the national academies of science of the major industrialized countries
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 05/14/2008 for the course SCI 101 taught by Professor Webb during the Spring '08 term at Pitt CC.

Ask a homework question - tutors are online