The group of scientists that make up the Intergovernmental Panel on Climate Change found in 2007 that the warming of Earth’s climate is unequivocal and largely due to human activity. Earth’s climate has changed in the past, though the recent magnitude and pace of changes are unprecedented in human existence....
Second Edition May 1969. Reprinted January 1979. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog