Who said "We must act as if our lives depend on it, because they do."?

This quote is attributed to Greta Thunberg.

We must act as if our lives depend on it, because they do. - Greta Thunberg

"We must act as if our lives depend on it, because they do."

Greta Thunberg Motivation

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."

"I believe in working hard for what you want."

"Never underestimate the power of determination."

"I don't need a reason to fight."

"The most important thing is the mission. Nothing else matters."