AFP: Scottish explorer Cairn Energy said Tuesday it had discovered gas in offshore Greenland, amid environmental protests by Greenpeace to stop its oil operations near the nation’s fragile coast. Cairn revealed the discovery alongside news of a return to profit in the first half of 2010, and uncertainty over its recent deal to sell a majority stake in its Indian unit, Cairn India, to mining group Vedanta. Profits after tax stood at 27.7 million dollars (21.0 million euros) in the …