Houston Chronicle: Rising temperatures are giving Greenland the opportunity to tap into billions of barrels of oil and gas trapped under ice. Greenland, a self-governed province of Denmark that’s roughly the size of Saudi Arabia, plans to auction off rights to crude oil and natural gas reserves officials believe will become feasible to exploit once the ice recedes. The island is setting a delicate balance for itself as both a bellwether to environmentalists looking for evidence of global warming, and as …