Business Green: David Cameron yesterday vowed that a Conservative government would increase financial incentives for geothermal energy projects in the UK, promising to accelerate the rollout of feed-in tariffs for ground source heat pumps and introduce new support for larger-scale deep geothermal plants. Speaking at an event in Cornwall, a region that scientists believe could be suitable for geothermal power plants, Cameron accused the government of failing to provide sufficient support to a sector …