It's a wonderful world for all 7 billion of us

Well hopefully. But the problem is there will be at least 2 billion more of us by 2050. Look at the population growth over the last two years.

World population in numbers

1 billion- 1804
2 billion- 1927
3 billion- 1959
4 billion- 1974
5 billion- 1987
6 billion- 1999
7 billion- 2011
Source: UN

Scary ehh.

Read this for more detail - http://uk.reuters.com/article/2011/10/25/us-population-baby-idUSTRE79O4DZ2011...

The stress on water management, food, minerals etc will cause many a war in the next 40 years as its already doing in many parts eg north Africa.

In the UK the population is also set to sore through immigration, birth rates and living longer.

So we can all expect to live in England's green and pleasant land OR more likely a concrete block.

I think it's the biggest issue facing the planet as it directly affects all others.