Green energy supplier? Prove it or pay: UK

LONDON (Reuters) - Britain’s power suppliers must prove that 6.7 percent of the electricity they sold last year came from clean energy sources or show that they have paid to pollute, UK energy regulator Ofgem said on Friday.

As public concern over climate change has intensified, energy firms have increasingly pushed their green credentials.

All suppliers in Britain are required by law to be a little bit greener each year under the government’s Renewables Obligation scheme. Those that fail to meet the slowly rising target can still buy their way out.

Ofgem calculates that UK power suppliers will need to prove by September 1 that they produced a total of 21,629,676 MWh of clean power in the year to the end of March, or pay 33.24 pounds ($67.23) for every megawatt hour (MWh) they fell short.

In England and Wales and Scotland, the obligation started at 3 percent of electricity supplied in 2002-2003 and for 2007-2008 it will rise to 7.9 percent.

From 2015 until 2027 the bar will stay at 15.4 percent, although Britain has set itself a target of getting 20 percent of all its power from renewable sources by 2020 in an effort to cut emissions of the gases which cause climate change.