Facebook announced major changes Friday to the Newsfeed used by 2 billion people every month and will now ask users to rank the news organizations they trust.

The trust rankings will emerge from surveys the company is conducting with its users and is an effort to combat fake news and misinformation that spread across the social network before and after the 2016 election. The changes will also promote local news sources.

Chief executive Mark Zuckerberg said the company itself is not “comfortable” deciding what news sources are the most trustworthy in a “world with so much division.”

The announcement is the second major change the company announced to its Newsfeed this year, an effort that is expected to reduce how much news appears in user feeds overall.