Business Green: The Conservative party yesterday accused the government of undermining its pledge to deliver a lower-carbon energy mix, by spending 20 times more on subsidising UK coal mines than it has on the emerging marine energy sector over the past six years, despite initially promising similar sums to both industries. Answers to Parliamentary questions have revealed that more than £50m of the government’s £60m Coal Investment Aid fund have already been distributed, while to date just £2.3m of …