Win Mcnamee | Getty Images News | Getty Images'A sensible rule to protect investors'"Climate risk is financial risk," Elizabeth Derbes, director of financial regulation and climate risk for the Natural Resources Defense Council, said in a written statement. "This is a sensible rule to protect investors: it gives them access to clear, comparable, relevant information on the measures companies are taking to manage climate risks and opportunities," Derbes said. Overall, transparency around climate risk may be essential for investors to gauge if a company's stock is worth holding or if its stock price is reasonable, experts said — for example, is it too expensive given high exposure to climate risk, or perhaps fairly priced considering it's well positioned? For many businesses, Scope 3 emissions account for more than 70% of their carbon footprint, Deloitte estimates. Instead, the final rule will require companies require Scope 1 and 2 emissions if they're deemed material to investors.

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Persons: Gary Gensler, Win Mcnamee, Elizabeth Derbes, Derbes, Rachel Curley Organizations: Securities, Exchange, Getty, Natural Resources Defense, U.S . Sustainable Investment Forum, CNBC, Deloitte Locations: U.S