BBC: The European Union is expected to tell the UK that 15% of energy needs must be met from renewable sources by 2020. The figure, currently about 2%, will include all energy used for heating and cooling buildings. Experts have called the target challenging because they say heating and cooling are hard to achieve on a mass scale using renewable fuels. The EU, which is trying to create a low-carbon economy in Europe, will announce its decision next week. Tough but …