Environmentally friendly funds have been drawing cash as Biden polling lead holds

Wind farm with solar panels in southern California
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Funds focused on sustainable investing are attracting record inflows as investors increasingly prioritize ESG metrics, or a company's environmental, social and governance factors.

Democrat Joe Biden's ascent in the polls and his environmentally friendly proposals have driven more investors into climate-focused funds, some of which have seen their shares more than double this year.

Here's a list of the most popular sustainable funds over the last month, according to data compiled by FactSet: