Investors urge Big Oil to follow 'poster child' Repsol's climate pledge

LONDON (Reuters) - Investors cheered Spanish group Repsol's pledge to slash net carbon emissions to zero by mid-century, saying they hope it will pile pressure on rival oil and gas companies to follow suit in the fight against climate change.The world's top oil and gas companies are under heavy pressure, not only from environmental groups but also from institutional investors, to fall in line with targets set in the 2015 Paris climate agreement to limit global warming.Repsol on Monday became..