Do I believe that humans are causing it and should do what they can to fix it? Yes.
Do I believe that it will have horrible impacts on the world many generations from now? Yes.
Humans adapt. When Global Warming finally takes its toll, humans might be well-adapted enough to deal with it . . . but for how long? I think it would be better if we remembered to be stewards rather than masters of the earth. It's more beneficial for everyone in the long run. Really.