We already know climate change happens, regardless of Man's input.
We need to advance science and technology, until we can develop our own, Atlantis type, submersible cities.
Our "finals" is to be able to build a RingWorld by the time our sun goes supernova.
My question is this; "Of all the climate changes that we have experienced so far, how much of it can ONLY be attributed to the actions of mankind and can NOT be attributed to any form of natural causes?"