Nature: China, responsible for about one-quarter of the worlds carbon dioxide emissions, has ambitious goals to reduce them -- but has been unwilling to set absolute targets for fear of slowing economic growth. There are now signs that its position is changing.
On 18 June, the country will launch an emissions-trading scheme in the southern city of Shenzhen, marking its first attempt to cut emissions using market mechanisms. Under the scheme, more than 630 industrial and construction companies will be...