"The UK population reached 61.4 million in mid-2008, having grown 408,000 in the previous year. More than two million people have been added to the UK population in the last seven years, and our numbers have increased by more than a fifth since 1950 - in less than a lifetime, in one of the most densely populated countries in the world." Optimum Population Trust
The Earth's massive and growing human population is the greatest threat to the planet's future. It exacerbates every other problem. The predictions make depressing reading unless humans tackle this issue now.
Need something to cheer you up? The video above offers a hilarious take on the problem. Remember to replace baby seats with condoms!