Second wave of Climate Strike protests take to the streets around the world

For the second week in a row, climate change activists marched around the world.

"Last Friday over 4 million people striked for the climate. This Friday we do it again. 170 countries and 6383 events so far in #weekforfuture," Thunberg tweeted.

Thunberg's activism has drawn the ire of conservatives, including President Donald Trump. After Thunberg spoke at the UN, Trump said, "She seems like a very happy young girl looking forward to a bright and wonderful future. So nice to see!"

Earlier this week Fox News had to issue an apology after conservative commentator Michael J. Knowles called Thunberg "mentally ill" on its network.