Source: Climate Reality Presentation & Training by Al Gore, presented in San Francisco, California on August 22, 2012.
Expanded Quote: by former Vice President Al Gore:
"The Deniers seem "certain" that the world's scientists are wrong, and that the spewing of 90 million tons per day of man-made global warming pollution into the atmosphere couldn't possibly be the problem."
Mark Twain once said, "It ain't what you don't know that gets you into trouble. It's what you know for sure that just ain't so."
For some reason, it is really hard for people who reject climate change to accept increasing the amount of of man made carbon dioxide and other greenhouse gases does cause climate change. Those dismissive folks will try to argue that it is volcanoes, the sun, the ocean, or other unknown factors.
So who is the culprit?
It can't be volcanoes because humans currently emit 35 gigatons of carbon dioxide into the atmosphere each year, which is 135 to 230 more than what the Earth's volcanoes are naturally emitting each year.
It can't be the sun because the total solar energy reaching the earth decreased in recent years from 1980 to 2010. While, during the same time, average global temperature have greatly increased.
It can't be the oceans either. According to professor in Environmental Sustainability and author, Tim Flannery, in his book 2005, The Weather Makers, p. 33,
"There is really only one major carbon sink on the planet, and that is the oceans. They have absorbed 48% of all carbon emitted by humans between 1800 and 1994, while over those same two centuries life on land has actually contributed carbon to the atmosphere." In other words, the oceans are actually absorbing almost half of CO2 human emissions each year that would outwise go into our atmosphere.
So, if it is not the volcanoes, the sun, and other mysterious characters that are causing climate change, what's doing it? Like it or not, it is the 90 million tons of carbon dioxide and other greenhouse that humans emit into our atmoshpere each day. It is us.
Image Source: Blog on Scientificamerican.com, August 2, 2011.