25 Stocks to Invest in a Cleaner World

Not all greentech is speculative. We've identified solid companies that should profit big from addressing climate change and encouraging the use of alternative fuels. And you'll profit, too.

Five Green Up-And-ComersGreen Investing is the Next Big Thing

Meanwhile, the focus on global warming promises to lead to greater regulation of greenhouse-gas emissions. Already, the European Union has instituted a quota for carbon emissions in response to the Kyoto Protocol, a global treaty that went into effect in 2005. The U.S. did not sign the treaty, but a number of states are acting on their own to limit these pollutants. In addition, Congress passed an energy bill in 2005 that offers subsidies for various new energy technologies, and it is considering another bill this year.

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Contributing Editor, Kiplinger's Personal Finance