Polution.

I think we should care more for our environment.

First of all, for our future children, because the atmosphere will be polluted and the people are going to get ill and they won't live many years. The cancer and other deseases will be frequent and the women will have more dificulties much more have babies.
It's a very important problem for everybody on this planet.

Nobody is really aware os this problem. In fact, it's a problem of selfishness, the people think that this will be solved itself in the future. It's a way of hiding the truth.
So the rich countries find good reasons to go on and make people believe they do their lest to protect the environment, in fact, they go on producing too much, the people consume too much.
Everybody something else is created and the people think they must have more and more, otherwoise they get unsatisfied.

They are completely inesposible because they don't care about the future generations and the whole planet. The Earth won't be able to afford more and perhaps on day, human beings will disappear like other species did in the past.