Kyoto's unfinished business

The Kyoto pact on global warming is neither a battle won nor a costly burden-more like a quick political fix for the vast problems of climate change. Above all, policymakers need to think more about the long term. Reducing greenhouse gas emissions requires including the developing countries who sat out Kyoto. Research into affordable energy sources that emit little carbon dioxide must intensify. And the world must develop international bodies to minimize the costs of cutting greenhouse gas emissions, including trading emission rights.