Yeah. It went from Industrial Farming to Global Warming...

I totally agree about the complaining. Every other Prius driver and their mother will be the first to quote An Inconvenient Truth, but don't give a shit when it comes to actually fighting Global Warming and giving up the forty trips to Starbucks a week and the four orders off of Amazon a month.

However, Humans act out of self interest. There's no arguing it. Even philanthropists just go by need to help people.
We should honestly care about the Earth. And that is what puzzles me, that it should be in our self interest to save it as it would also most likely be the easiest way to preserve our species.
I agree with EvilM00s that you can be responsible and live your life.

Until I started to study psychology, I did not know how similar we are to animals. I always tended to think that humans had nothing to do with animals. Once I started to analyze and study their behaviors, I realized that there is probably no human emotion or behavior that doesn't already exist in the animal world. I felt a little dissapointed at first, but that's the way it is. Now I think differently about animals and the way they're treated. The're living beings, not furniture. They feel stress, sadness, fear. For me, it is not acceptable that we, the "rational" race, "superior to all animals", are unable to feel compassion for them or treat they as what they are.
I'm not vegetarian, but I always buy meat from well treated animals (or at least that's what the label says ) It's much more expensive, though.

And, about climate change, I don't think mankind has much to do with it.
(I tried to explain the best I could, I'm not native english speaker so I hope it will not be too difficult to understand)