Three years ago, the government of India's wealthiest state jolted the international business world by cancelling a huge U.S. power plant being built on a red volcanic bluff in Guhagar, Maharashtra. Environmentalists had been saying it would destroy fish and famed mango groves. Today, the power plant towers over the Arabian Sea coast, and in a few days it will fire up its huge turbines and begin selling electricity. It is Enron's biggest project abroad and India's biggest foreign investment. And both sides, it appears, coundn't be happier.