In 2020, China’s President Xi Jinping pledged that China would both peak its emissions by 2030 and achieve net-zero emissions by 2060 — a change that will require action at an unheard-of scale and speed. Can the country actually achieve this ambitious vision? In this forward-looking talk, environmental journalist and analyst Hongqiao Liu explores what the world’s largest carbon emitter (and second-largest economy) will need to do to get there.

What if you could eat chicken nuggets without harming a chicken? It’s possible through “cellular agriculture,” says Isha Datar. In a talk about cutting-edge science, she explains how this new means of food production makes it possible to eat meat without the negative consequences of industrial farming — and how it could fundamentally change our food systems for the better. “It’s our once-in-a-lifetime opportunity to get a second chance at agriculture,” she says.

Skin is one of the most powerful predictors of health, yet nearly half of all new dermatologists admit to feeling uncomfortable identifying health issues on darker skin tones — resulting in poorer health outcomes for patients of color. In this crucial talk, TED Fellow and dermatologist Jenna C. Lester shares her effort to extend medical training beyond its current limited scope and ensure all medical students get trained in the full spectrum of diseases as they appear in all patients, regardless of skin tone.

“Every conversation has the potential to open up and reveal all the layers and layers within it, all those rooms within rooms,” says podcaster and musician Hrishikesh Hirway. In this profoundly moving talk, he offers a guide to deep conversations and explores what you learn when you stop to listen closely. Stay tuned to the end to hear a performance of his original song “Between There and Here (feat. Yo-Yo Ma).”

Activism is a tough job, especially for young people yearning for immediate change — something climate activist Melati Wijsen has learned over ten years of pushing for environmental protection, starting at age 12 in her home on the island of Bali, Indonesia. How can young changemakers acquire the skills they need and keep from burning out? Wijsen offers three pieces of advice for anybody seeking to make lasting, sustainable progress.