He broadcast this email (which I amended to include his updated calculations).
His maths: $60 trillion/.0012/6.5 billion = $10 (rounded figures). He points out that it is more useful to break down the global figure by country and filter it though its GDP. For example, for Gambians this would cost $2.00 per head, and for Americans the cost would be $478.
4 May 07
The UN's Intergovernmental Panel on Climate Change concluded that it would cost .12% of the world's domestic product to substantially reduce our collective greenhouse gas emissions.
- GDP of the world economy: US$60 trillion
- .12% of $60 trillion: $70 billion
- Total population of the earth: 6.5 billion
- Cost per person to significantly reduce heat-trapping gas worldwide: $10 a year
- Cost of saving the planet from droughts, famine, mass flooding, species extinction and rising sea levels: priceless.
Tags: global warming, climate change