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Unformatted text preview: S IX D EGREES C OULD C HANGE THE W ORLD N ATIONAL G EOGRAPHIC – 2008 R EVIEW OF M OVIE : “6 degrees will basically endanger animal life, cause famine, ware, and also the odd flooding and hurricane. Big spoiler, in fact this does not happen during the documentary, this will only happen to our kids.”  Is it right for us to be leaving the Earth in worse condition than we found it?  The past climate of the Earth provides much information that is relevant to determining how fossil fuel burning and deforestation will affect the Earth’s climate in the future. • The earth’s climate has been highly variable.  Since humans first appeared on the earth about 150,000 years ago, the climate of the Earth has been unusual in several respects: • The climate has been colder than usual. • The climate has been relatively constant. • There has been a lot less CO 2 in the atmosphere than usual.  Living organisms first appeared on the Earth, and life has evolved and flourished on the Earth, under conditions very different from now. L ONG- TERM REGULATION OF CLIMATE : • Sun is major determinant of Earth’s climate. • Without the Sun the temperature of the Earth would be absolute zero. (-273C)  The solar system was formed about 4.5 billion years ago: • This is based on the age of meteorites, which are assumed to be remnants of the early solar system ( Chair Patterson, 1953).  Not everyone agrees that the Earth is 4.5 billion years old: • Earth was created at noon on October 23, 4004 B.C. o James Ussher, Church of Ireland. W HAT HAS BEEN HAPPENING TO THE SUN IN THE LAST 4.5 BILLION YEARS , AND WHAT WILL HAPPEN IN THE FUTURE ?...
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- Spring '08
- MYA, mya o PT, state ACHAEAN EON, Atmosphere CO2 concentrations, WORLD NATIONAL GEOGRAPHIC