The top 200 companies who generate the bulk of their revenue from clean energy have offered juicier returns to investors over the past 18 months than their counterparts in fossil fuels.

A new report from As You Sow and Corporate Knights finds that not only is the clean energy sector growing quickly, but investors are better off putting their money into renewable energy and other clean energy stocks than oil and gas. The largest 200 companies that generate at least 10 percent of their revenues from clean energy have generated a total return of 32.1 percent in the past year-and-a-half, compared to just 15.7 percent for fossil fuel companies in the S&P 1200 Global Energy Index.

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