Facebook Inc will begin to prioritize "trustworthy" news outlets on its stream of social media posts as it works to combat "sensationalism" and "misinformation," Chief Executive Mark Zuckerberg said on Friday.

The company, which has more than 2 billion monthly users, said it will use surveys to determine rankings on how trustworthy news outlets are.

Zuckerberg outlined the shakeup in a post on Facebook, saying that starting next week the News Feed, the company's centerpiece product, would prioritize "high quality news" over less trusted sources.

"There's too much sensationalism, misinformation and polarization in the world today," Zuckerberg wrote.

"Social media enables people to spread information faster than ever before, and if we don't specifically tackle these problems, then we end up amplifying them," he wrote.

At the same time, Zuckerberg said the amount of news overall on Facebook would shrink to roughly 4 percent of the content on the News Feed from 5 percent currently.