The word "sustainability" gets thrown around a lot these days. But what does it actually mean for humanity to be sustainable? Environmental data scientist Hannah Ritchie digs into the numbers behind human progress across centuries, unpacking why the conventional understanding of sustainability is misleading and showing how we can be the first generation of humans to actually achieve it.

Your favorite pair of jeans -- the ones you refuse to throw out -- are actually a part of a global climate solution, says fashion entrepreneur Josephine Philips. When you value your existing clothes instead of chasing the latest trends, you help reduce waste and protect our planet for generations to come. Learn more about the impacts of what you wear -- and the incredible power of repairing your clothes.

"AI can be a transformational tool in our fight against climate change," says Sims Witherspoon, a leader at the AI research lab Google DeepMind. Using wind power as her case study, she explains how powerful neural networks can help us better predict Earth's changing ecosystems and accelerate the breakthrough science needed to create a carbon-free energy supply.

The power sector generates the electricity that sustains modern life -- but it's also the number one contributor to climate change. We need a swift and equitable shift to renewable energy, says 2023 Audacious Project grantee and ReNew2030 executive director Rebecca Collyer. In conversation with TED's David Biello, she introduces a new coalition of governments, businesses and communities that aims to drastically scale wind and solar capacity in the 30 highest-emitting countries. Learn more about their plan -- and why Collyer has hope for a greener, more equitable future. (This ambitious idea is part of the Audacious Project, TED's initiative to inspire and fund global change.)

Climate change doesn't care about ideological divides, says policy analyst and China expert Changhua Wu. Here's what she says the US can learn from the progress China has made on the clean energy revolution -- and why collaboration instead of competition is the key to avoiding climate catastrophe.