An Inconvenient Truth- Fact #4

Fact 4: The U.S. is responsible for most of global warming, more than any other country.
Source 1: http://www.articlemyriad.com/global_warming_united_states.htm This source is not credible at all because no names are given and a writer tried to "sweet talk." The source said that greenhouse gases have risen 70% from 1970-2004 and that the U.S. uses non-renewable resourses way out of proportion to our population. I do know that the U.S. should use more eco-friendly products, but I have a hard time believing we are the worst in the world! As much as I would like to believe this to improve our world, I can't because the article is not credible and I want to see examples.
Source 2: http://www.eia.doe.gov/kids/energyfacts/sources/non-renewable/oil.html This source is credible because it was produced by the energy administration. It states that the U.S. uses a high quantity of petrolium products, which are non-renewable. These oils and gases are a leading cause in global warming. I agree because this is a fact, it just states that the U.S. uses these products and I've seen it for myself.
Source 3: http://ecologicalproblems.blogspot.com/2008/02/usa-mainly-responsible-for-global.html This source is an Ad by Google which makes me think its not too credible. This article says that the U.S. produces 25% of greenhouse gases and is only sadly 9% of Earth. It also says that we are to be blamed for global warming and yet we are the least affected by it. I agree and diagree with this. There are other countries way worse affected by the effects of global warming the the U.S. (like hurricanes). However, Katrina hit the U.S. pretty hard.