I would say that we should just try and leave the Earth in no worse of a condition than when we arrived at it. I doubt that we can reverse what we have done, and some of it wouldn't even make sense to reverse (like all the roads and buildings and such). But, as our population grows, if we don't start recycling, we'll run out of room to store all our garbage.
Do you use your head for crushing them?
I meant the individual.
Not everything is about the so called "global warming". Not filling the land with consumer wastes or putting toxic waste into the water and land would be a start.
I don't think that you have to be a "tree hugger" to think that filling the world with garbage that won't compost for hundreds of years is a bad idea.