The UK has passed binding legislation to curb CO2 emissions. The government will need to “count the carbon, just as they count the pennies,” says Treasury chief Gordon Brown. The bill called for emissions to be reduced by 60 percent by 2050, and by as much as 32 percent by 2020. Targets were based on 1990 levels. The Green Party said emissions should be reduced by 90 percent by 2050.