The problem with our environment is too many of us

The problem with our environment is too many of us: "Natural selection has ensured that we are well-endowed with selfish genes. We will always put self before family, family before community, community before country. Hence efforts to get international agreement on controlling global carbon emissions will always be bedevilled by the "after you" syndrome.

The latest report of the UN population division of March 11, 2009 shows that the world's population is 6.8 billion, and is expected to exceed 9 billion by 2050.

When I was born in 1930, there were only 2 billion people on Earth. What has happened to cause this staggering increase, and for how long can it continue?