Who said "You have had 30 years and done nothing. That is not enough."?

This quote is attributed to Greta Thunberg.

You have had 30 years and done nothing. That is not enough. - Greta Thunberg

"You have had 30 years and done nothing. That is not enough."

Greta Thunberg

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."