The Earth is definitely getting warmer and polar ice caps are melting. Is it really human's fault. Did we cause the ice age? Did we end it? Are we causing the present cycle? I think not.
Is there anything we can do about it? Colonize space? Is something like Star Trek Deep Space 9 in human's future?
One thing is certain, the caps are going to melt and it's going to get hotter than 700 Hell's in no more than 100 years. Life will be miserable in many places on Earth.