I read an article just days ago and unfortunately can't locate it again, but the basics were:

The population of our planet now exceeds 6.5 billion and is rapidly shooting up toward 7 billion.

Experts have declared that we have now gone beyond the levels of sustainability. We have reached a bottleneck in history; our resources are being stretched to their limits and all the evidence points to continued exponential population explosion.

What will happen? What can we do about it? When is enough enough? Why do we keep reproducing like this?

Personally I have an affinity with the Gaia theory and feel that it's no coinicidence there are a rising level of natural disasters occurring. If you're head becomes filled with lice, eventually you're going to start scratching.

Tongue in cheek though it sounds, the only advice I can offer with regards to this situation today is:

Heterosexual people: STOP HAVING SEX!!! OR START USING CONDOMS, for goodness sake!!

And STOP OPPRESSING GAY PEOPLE. The world clearly needs MANY MORE gay people!!!