Green bonds could spur on sustainable economy, reports OECD | Environment | guardian.co.uk

The costs of fighting climate change could be halved on average if the world placed a monetary value on longer human life-spans arising from a move away from high-polluting fossil fuels.

The US would benefit most, according to the estimates. Gains in life expectancy through reduced air and water pollution "would overcome the monetary cost of climate change mitigation by a significant amount".