The one sector which is running amok in terms of growth of emissions is transport. Between 1990 and 2005, the maximum increase in emissions of rich countries was in this sector: 28 per cent. It is virtually wiping out all other gains in emissions reductions. In 2000, transport contributed 14 per cent of the world's greenhouse gas emissions and in 2005 almost 50 per cent of oil consumption went into running vehicles.

There are an estimated 900 million automobiles in the world (excluding two-wheelers) and by 2030 this figure is expected to cross 2.1 billion. Aviation and shipping-related emissions are also rising. Options being considered to deal with transport-related emissions are:

increasing fuel efficiency of vehicles;
running vehicles with fuel from plants