What do you mean , how long are we able to live on this planet without still bigger nature problems and consequences?

We as a race will die long long before our planet dies, of course it won't be 'our' planet then!
You can't worry about these things or let them have a negative effect on your life, yes be positive and active in trying to minimise or halt your effect on the planet/climate etc... but don't let it make you angry, because you will do nothing but destroy your own life, which is extremely small within the grand scale of the planet!

Lets be honest a nuclear war and we will kill ourselves and the planet but luckily the planet may regenerate itself without destructive humans on it. There always have been and always will be natural disasters that happen now and then and wipe a heap of us out and theres nothing we can about it really. Our actions will have a long term impact on the planet but I don't believe we will kill it simply through our pollution at this stage but we will make it less than nice to inhabit. The planet used to be more enjoyable before every lazy sod starting through their rubbish out of their car or tossing their cigarette butt on the ground.