"Overpopulation refers to when an organism’s numbers exceed the carrying capacity of its habitat."

I would love to see some hardcore numbers how many inhabitants our "habitat" can support in an sustainable way?

Our oil reserves won’t last much longer and within fifty years our petrol based lifestyle and food production will simply collapse, because the supply won’t last. At least it seems production rates already can’t keep up with demand.

But we all as a world community have to figure out how many people this planet can support - so we can plan and adjust. We will need to once again have to look seriously on family planing, productions numbers and available resources - but in a scientific way.

More? Overpopulation @ Wikipedia

BBC News: Sharks swim closer to extinction

Sharks are not breeding like cattle - which means we eat them faster than they can breed.

Excellent - so we now longer need to worry about being eaten by sharks since we simply ate them.

But I am also pretty sure we will figure out that shark are an essential part of OUR mutual ecosystem - because they are one of the oldest species around (from Wikipedia):

Evidence for the existence of sharks extends back over 450–420 million years, into the Ordovician period, before land vertebrates existed and before many plants had colonised the continents. All that has been recovered from the first sharks are some scales. The oldest shark teeth are from 400 million years ago. The first sharks looked very different from modern sharks. The majority of the modern sharks can be traced back to around 100 million years ago.

Similar to bees or ants  - sharks serve a very important function as hunter and "cleaner" in our oceans.

I always said humanity should be exterminated to save the planet!

According to new research 30% of our planets usable land is used for growing food for humans. This is a HUGE number - I didn’t expect to be so high.

So it’s no surprise that so many species go extinct since we are eating up all the space and create more and more farmland to produce food and now biofuels. Plus we need space for our exploding cities and infrastructure …

Once again I think the real problem here is overpopulation. Too many humans needing too much space.