Reuters: British lawmakers on Wednesday voted in favor of the use of fracking to extract shale gas under national parks, weakening a decision against fracking in national parks made earlier this year and giving shale gas explorers access to more resources. Britain is estimated to have substantial amounts of gas trapped in underground shale rocks and Prime Minister Cameron has pledged to go all-out to extract these reserves, to help offset declining North Sea oil and gas output. But the use of fracking,...