Guardian: What are the "green charges" that David Cameron wants to roll back? These are extra costs levied on household gas and electricity bills to pay for low-carbon energy sources such as windfarms and solar panels. The government has always insisted the charges will help cut energy bills in the long run by reducing Britain's dependence on fossil fuels at the same time as helping to tackle climate change. They currently make up 9% of household bills and are projected to make up 14% by 2020. What are the...