Former national security adviser Susan Rice, reportedly one of two finalists in Joe Biden’s vice presidential search, had millions invested in fossil fuels and energy companies as recently as 2015. The revelations come as Biden has faced renewed questions about his commitment to environmental policies that would combat climate change.

A financial disclosure form obtained by Too Much Information reveals that Rice had investments in at least five such companies, including as much as $100,000 in TransCanada, which is behind the controversial Keystone XL pipeline. Rice also had over $1 million invested in pipeline firm Enbridge as well as more than $2 million split between fossil fuel companies Cenovus, Encana, and Imperial Oil — all companies with significant involvement in developing the tar sands of Alberta. The investments netted as much as $237,000 in dividends that year.

In addition, Rice reported significant holdings in Canadian banks which fund pipeline projects, according to the disclosure.