Quote:
Originally Posted by ELVIS
Prove it...
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Without humans, we'd have neither of these on the planet. I don't need to "prove" that...it's pretty obvious that the following two pictures would NOT exist here without us.
Motor vehicles are responsible for almost a quarter of annual US emissions of carbon dioxide (CO2), the primary global-warming gas. The US transportation sector emits more CO2 than all but three other countries' emissions from all sources combined. And motor vehicle emissions will continue to increase as more vehicles hit America's roads and the number of miles driven grows.
Three factors contribute to CO2 emissions from cars and trucks:
* Amount of fuel used
* Amount of CO2 released when a particular fuel is consumed
* Number of vehicle miles traveled
Combating global warming requires reducing all of these factors. This necessitates increased fuel efficiency, switching to renewable fuels, and less driving.
NRDC: Global Warming Basics
Carbon dioxide and other air pollution that is collecting in the atmosphere like a thickening blanket, trapping the sun's heat and causing the planet to warm up. Coal-burning power plants are the largest U.S. source of carbon dioxide pollution -- they produce 2.5 billion tons every year. Automobiles, the second largest source, create nearly 1.5 billion tons of CO2 annually.
Global Warming - U.S. Autos Account for Half of Global Warming Linked to Cars Worldwide
U.S. automobiles and light trucks are responsible for nearly half of all greenhouse gases emitted by automobiles globally, according to a new study by Environmental Defense.
The study, Global Warming on the Road [PDF], also found that the Big Three automakers—General Motors, Ford and DaimlerChrysler—accounted for nearly three-quarters of the carbon dioxide released by cars and pickup trucks on U.S. roads in 2004, the latest year for which statistics were available.
“Cutting greenhouse gas emissions from U.S. automobiles will be critical to any strategy for slowing global warming,” said John DeCicco, author of the report and senior fellow at Environmental Defense, in a press release. “To address global warming, we’ll need a clear picture of what sources are contributing to the problem. This report details, by automaker and vehicle type, the greenhouse gas contributions from America's auto sector, for the first time.”
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There. Proof that global warming wouldn't exist on the (unnatural) level that we have now without human interference.
No humans = no coal burning = no auto emissions = LESS warming.
Very simple. Amazing that America is virtually the ONLY civilized country left on this planet that still has people arguing about that.