"We live in a broken system, one where the richest 1% of the world population are responsible for more than twice the pollution as the poorest 50%. That's why we strike."

"The climate crisis has not disappeared," said Swedish activist Greta Thunberg. "It's the opposite—it's even more urgent now than it was before."

Returning to the streets a year into the coronavirus pandemic, youth campaigners are calling for "no more empty promises."

"If we stand back and do nothing, letting global warming prevail, we will lose our identity, and the town we love—as well as many others around the world—will cease to exist as we know it," said the mayor of Salla.

"We need to face the full picture. We are facing an existential crisis, and this is a crisis that we can not buy, build, or invest our way out of."

U.N. Chief António Guterres declared the pandemic "an unprecedented wake-up call" and urged world leaders to pursue a "green recovery."

"Emissions from fossil fuels and deforestation need to be reduced to ZERO to stop this trend!"

"We cannot afford more days going by without real action being taken."

"We are facing the greatest existential crisis humanity has ever faced. And yet it has been ignored. You who have ignored it know who you are.”