Great article on the environmental effects of animal consumption.
Poor article on the nature and cause of global climate change.
I have no doubt that the report Steve mentions and links to is a well conducted piece of scientific evidence, and that the many scientists behind it fully believe their conclusions will be true. However, there are also many scientists standing against the idea that humans are the primary cause of modern climate change. For instance, the Petition Project is a group of over 31,000 American scientists that disagree with the findings of Al Gore and others.
I am glad, at least, that Steve has the sense to be wary of Gore himself and the show he puts on. Al Gore's movie was a tearjerker meant to stir up emotions by molding a scientific subject into a sob story about a former president hungry for political means to his questionable ends.
My recommendation to Steve is to not take sides in the debate over climate change. As you said yourself, you are not an expert in the area. I admit that I'm not either. Because of that, I don't support any particular view on this subject, but rather focus on the important:
Eating a healthy vegetarian or vegan diet, reducing consumption of foreign oil, decreasing air and water pollution, and developing cleaner energy are GOOD for us even if global warming is a farce!
If everyone spent less time bickering over whether climate change is man-made and more time making personal changes to improve their environmental impact in the world, we would be a lot closer to a greener planet.
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