Environmental + global problems

What´s your view on "global warming" and "climate change" - are they a real threat to the future of mankind or a natural process that we can adapt to and deal with? Write ca. 50 words. Is there anything you (and your family or friends) do to protect / improve our environment and to contribute to its pollution as little as possible? Write ca. 50 words (or more :-)) What are the most serious and alarming "global problems" we face? List at least three.