The London Accord, in association with Z/Yen, has published two pieces on an interesting and simple idea, index-linked carbon bonds issued by governments. The Z/Yen team contend that the key item blocking clean tech investment is the risk of government inaction. In order to hedge that risk, investors could buy government bonds that paid more interest if governments failed to meet carbon emission, feed-in tariff or other carbon-related targets. The idea was presented at the World Bank Government Borrowers' Forum in Ljubljana in May by Dr Kevin Parker and we are now in discussion with several governments, central banks and debt offices. All online here.