[yogeshp]

I think the movie Interstellar closely depicts how life on Earth may turn out. Climate change is never going to stop, humans except few just don't care. Instead they will try to create more machines which will try to use carbon engineering to reduce CO2(as one discussed few days back on HN). With less need for trees and more need to fulfill population demand, if this technology becomes successful, it can be a doomsday scenario for trees and land everywhere will slowly start to erode resulting in greater imbalance in the ecosystem and eventually worldwide famines. Add to that, thawning of permafrost will release large amount of methane along with bacteria which were inactive since ages and for which humans may have no cure.

Most of CO2 is absorbed by oceans, and humans may never be able to find a way to tame CO2 there, this will result in much faster melting of ice in Arctic and Antarctica than anticipated.

No, humans aren't going to find an alternative habitable planet anytime soon where they can travel.

[martincmartin]

In the '70s, movies like Soylent Green depicted how people thought Earth may turn out: more and more people supported by limited resources, food riots, etc. e.g. China introduced the one child policy to head this off.

In the '80s, movies like War Games and The Day After depicted how people thought Earth may turn out: nuclear war triggered through Mutually Assured Destruction. (Source: I lived through the '80s.)

you get the idea.