Arctic sea ice has declined by over thirty percent since the 70s. It is not coming back. 

Ozone layer is plunge with a ton of heat emitting gases and it is hard to restore.

Weather is becoming more extreme, with record breaking temperatures both high and low occurring with increased frequency world wide, and widespread flooding, storms, and droughts. This will not cease.

Climate change is already irreversible. We aren't talking about will we stop it, we've already failed to stop it, we are now talking about how much further damage we will cause.

It is a fact that human influence does change the climate in global scale but what people is arguing is actually not whether human activities change the climate or not but whether it is the human influence is dominating the climate trend or the natural process does.

Human economic activities are already reached the scale and depth that can influence the environment that is the fact, so whether it is the human factors that is dominating the climate change, it is so sad to think that only a few of us are moving forward for a safe home, because the human perspective is it cannot change the fact that human activities are influencing the environment in a positive way in global scale. chemical population, plastics pollution, ecosystem destruction, top soil destruction, underground water exhaustion and etc.

How much of a problem this will be to mankind depends on how fast the problems develop. Given enough time, we will move populations and build water pipelines but I would wager that fifty years from now, water will be near the top of mankind’s list of troubles.