Who said "Action, not words, is what we need."?

This quote is attributed to Greta Thunberg.

Action, not words, is what we need. - Greta Thunberg

"Action, not words, is what we need."

Greta Thunberg Work

Climate Activist, Student Swedish Born 2003 (age 23)

"Our house is on fire. I want you to panic."

"You are not mature enough to tell it like it is. Even that burden you leave to us children."

"No one is too small to make a difference."

"A lot of people want to just continue not doing anything."

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."