The UK government on Tuesday backed the exploration of shale gas nearly one year after it temporarily banned the drilling method which triggered two earthquakes in Britain but that has also revolutionised the U.S. energy market. An expert report commissioned by the government said shale gas fracking, a process where pressurised water and chemicals are pumped underground to open shale rocks and release trapped gas, was safe to resume with tighter rules on seismic monitoring and drilling surveys. --Alessandra Prentice, Reuters, 17 April 2012