It's all a fine balance, once we loose it we will be no more, wherever we are right now and whatever we are doing it will take more than 3000(guess) years to destroy earth. We are doing what we are doing now for only 100 years. So 2900 years left for DOOM at the minimum.
There is a catch if we continue catching and eating all marine life in oceans, yes we are eating away oceans taking the life away from them threatening our own, we can do all we want if we can replenish life in oceans, stop dumping sh*t into them(or dump after treating properly). Even if we make them barren and lack of life we still can exist for the rest of the 2900 years but there will be hunger and chaos.
The 3000 year time we have is based on our current pollution rate/projected growth over next several years, Technological advancements in future that address Pollution problem etc.
The globe we see today is very tranquil, but life existed and flourished even in the age of volcanic eruptions(think about the pollution they caused!) and ice ages. Human power is nothing in front of nature's, we can only be ever able to touch the surface even if our technology enables us to did miles deep, we will still be drilling the "ORANGE PEEL" we are like ants and insignificant in a sense if you think of mother Earths dimensions.
So there is nothing we can do except safeguard ourselves by knowing how to have uninterrupted supply of fresh air, clean water, food supply, proper shelter and means to get around safely.
There is NO DOOMS DAY(not shouting just emphasizing) except something from outer space comes and takes us, SUN devours us, because over time many millions of years in future EARTH orbit is getting closer to SUN, or due to some unknown phenomenon not yet known to man devours both Earth and Sun. Everything else is natural and not threatening if you know how to survive, Ancients survived and took the wrath of nature without any existent technology just being PRIMITIVE.
I believe LIGHT is not the fastest traveling thing in the world, there is something else that is faster and we are not able to see it! if there is a dooms day like some predict, it should be this faster thing that will take all of us in a split second(this is also a possibility in addition to the above).
Whatever happens if there is DOOMS DAY, we will never SEE IT, because we wouldn't be there to DISCUSS about it. It's the END for all things we know.
We will never know when dooms day will come, if it ever comes it will all be painless.
Like Rexen said "his life is now light,luxurious,and long..." have fun while it lasts don't think too much about it.
Thanks Rexen for making this thread, I like to spin my brain
Regards,
Nanda.