There has been much hand wringing here about the specter of protectionism, and in particular about the "Buy American" plan in Barack Obama's $819 billion stimulus package, which passed the House of Representatives this week. The fear is that it will trigger a round of protectionist policies in countries throughout the world, and it only added to the sense of economic gloom that has pervaded this year's forum. But there is one bright spot amid the despair: executives here from the renewable energy sector are confident that business will be just fine. After all, built into the stimulus package are billions of dollars worth of tax credits and incentives for solar, wind and other alternative energy companies.