Environmental advocacy groups are celebrating a proposal from the US Securities and Exchange Commission (SEC) that would require publicly traded companies to share with their investors the risks their companies face from climate change and their greenhouse gas emissions.

โ€œInvestors need to know the climate risks that public companies face so that markets can function fairly and efficiently,โ€ย saidย Sarah Dougherty, director of the Natural Resources Defense Councilโ€™s Green Finance Center. โ€œThis is an important first step toward ensuring that investors can identify companies taking the risks of climate change seriously.โ€

While the SECย previously released guidanceย about disclosing climate risks in 2010, and some companies already voluntarily report such information, climate disclosures have never been mandatory โ€” despite the trillions of dollars of financial damage weather- and climate-related disasters have wroughtย in the United Statesย since 1980.ย Studies have shownย that, during that time, climate change has been worsening the intensity and frequency of these events.

Under theย proposed rule, companies listed in the US would have to follow a standardized process in their periodic filings to disclose the impact of climate risks on their business and strategy, governance of their climate risk management process, direct and indirect greenhouse gas emissions, and information about the companyโ€™s climate targets, goals, and plans.

The SEC adopted the proposal with a 3-1 vote. Only the single Republican SEC commissioner, Hester Peirce, voted against it.

โ€œToday, investors representing literally tens of trillions of dollars support climate-related disclosures because they recognize that climate risks can pose significant financial risks to companies,โ€ said SEC Chairman Gary Genslerย in supportย of the rule.

Environmental advocacy groups strongly supported the promulgation of the rule. For example, the Sierra Club submitted public comments last June fromย more than 10,000ย Americans to urge the SEC to develop disclosure rules.

Ben Cushing, the Sierra Clubโ€™s Fossil-Free Finance campaign manager,ย said that the ruleย โ€œis especially important given how many companies have made commitments to address their climate impact without disclosing the full scope of their emissions, the risks their own businesses face from climate change, or the relevant business plans to achieve their climate pledges.โ€

Other prominent environmental groups such as theย Environmental Defense Fund,ย League of Conservation Voters, andย Union of Concerned Scientistsย have also issued statements commending the SEC proposal and calling for a strong rule to be finalized quickly.

But it wasnโ€™t just environmental groups that called for new climate disclosure rules. BlackRock Inc., which created headlines in the past year not just for being the first asset manager to achieveย $10 trillion in assets, but also for CEO Larry Finkโ€™sย strong messagingย on the importance of climate action, was one of the companies thatย wrote in supportย of mandated climate-related disclosure during the rule drafting process.

The public will have 60 days to comment on the draft rule before a vote to finalize the regulation is held. However, there is no publicly stated timeline from the SEC for when the rule may come into effect.

Any final rule is expected to be challenged in court.

The American Petroleum Instituteย released a statementย expressing concern that the โ€œsweeping proposalโ€ could โ€œcreate confusion for investors.โ€

And 16 Republican state attorneys generalย signed a letterย last June that objected to the developing rule. The group was led by West Virginia Attorney General Patrick Morrisey, who has alsoย threatened to sue the SECย over possible mandated disclosures relating to environmental, social, and governance matters.