• When I was a boy in the 1930s, the carbon dioxide level was still below 300 parts per million. This year, it reached 382, the highest figure for hundreds of thousands of years.

    David Attenborough: When I was a boy in the 1930s, the carbon dioxide level was still below 300 parts per million. This year, it reached 382, the highest figure for hundreds of thousands of years.
    "Attenborough: Climate change is the major challenge facing the world". www.independent.co.uk. May 23, 2006.