Rich nations, including the US and UK, are planning to push rapidly industrialising nations like China and India into accepting "back door" limits on their greenhouse gas emissions. They want climate negotiators to agree global technical standards on "dirty" manufacturing industries like aluminium, iron and steel, cement and chemicals - standards that would apply equally to factories in the US, Italy or India, for example. This strategy emerged last week in meetings at the Royal Society in London to discuss the successor to the Kyoto protocol, which expires in 2012.