There's no greater threat to humanity than climate change. What can we do to stop the worst consequences? On this week's show, TED speakers explore how we can save our planet and whether we can do it in time.

In 2018, teenager Greta Thunberg began protesting to demand action on climate change. She has inspired protests worldwide. Greta says it's time to panic: we're running out of time to save our planet.

To slow climate change, we need to lower emissions and remove carbon from the atmosphere. Chemical engineer Jennifer Wilcox says the technology is there, and we need to scale it In 1988, the Montreal Protocol was the first step in a long process to save the ozone layer. Sean Davis explains the impact of the agreement, and the lessons we can apply to the crisis we face today.
Bruce Friedrich shows how plant and cell-based products could soon transform the way we eat ... and reduce the global meat industry's impact on the planet.

Psychologist Per Espen Stoknes explains the inner defenses that block most people from recognizing the urgency of climate change. He asks, what is a better way to think and talk about this crisis?