Although disclosure requirements for the emission of greenhouse gases are currently voluntary, they may become mandatory. The SEC is showing a greater interest in mandating that companies disclose known or expected effects that climate change may have on the company's financial health. This may include quantifying the financial effects of a cap-and-trade program on companies. According to Elisse Walter, one of five commissioners at the SEC, "I think with the changes in the environment and everything that's been happening, it's really time for us to take another very serious look at the disclosure system in this area. I think it's a very serious issue." Currently, most companies do not mention climate change in their annual reports.