Anyone over 30 will probably not see the total demise if the planet, but anyone born today or under 20 will likely see a different world in 40-50 years.
It's great that some people use solar and wind power and drive electric cars, but you know what? Things like that are for the rich. People in 3rd many third world countries are barely getting by as it is, let alone have time to think about recycling and emissions and climate change.
The bottom line is we have passed the point of no return. The planet will warm and fossil fuels will eventually run out and since everyone basically lives for today and only a small percentage of the planet actually cares about the future, while those of you reading this are not doomed, your grand children certainly are.
Money makes the world go round, and there is no profit in climate change, so there will be no change in the people of Earth either.
Fare thee well!