We still have a lot to learn about climate change, about why it's happening and what that means. But one thing is clear: It's real, alright. These talks provide a primer on the issue of our times.

Learn about the ways climate change is deeply altering how we live, where we live and the foods we eat -- ultimately threatening some of our most basic human rights.

Lord Nicholas Stern studies the economics of climate change. He is a co-author of the position paper presented to the UN's 2014 Climate Summit, called "The New Climate Economy."

Robert Swan has explored both poles, and wants to make sure that Antarctica, the world's last great wilderness, is never exploited.

You can't understand climate change in pieces, says climate scientist Gavin Schmidt. It's the whole, or it's nothing. In this illuminating talk, he explains how he studies the big picture of climate change with mesmerizing models that illustrate the endlessly complex interactions of small-scale environmental events.

Tim Kruger researches geoengineering: techniques to counteract climate change by deliberate, large-scale intervention in the earth system -- either by reflecting sunlight back into space or by reducing the level of carbon dioxide in the atmosphere.

Robert Lee Hotz is the science columnist for the Wall Street Journal, where he writes about cutting-edge research on climate change, cosmology, molecular medicine, the human brain and much more ... He has traveled three times to the South Pole.

Antonio Donato Nobre researches the “ingenious systems” of the Amazon. His work illustrates the beautiful complexity of this region, as well as its fragility against a backdrop of climate change.

What goes into a climate model? Gavin Schmidt looks at how we use past and present data to model potential futures.

Nobel Laureate Al Gore focused the world’s attention on the global climate crisis. Now he’s showing us how we’re moving towards real solutions.

For billions of people, seafood provides a significant source of protein and nutrition, but over half the seafood we eat isn't caught in the wild, it's grown through aquaculture. Farmed seafood is one of the fastest-growing food industries, but the farming methods echo the problems we've seen in industrial agriculture. Is there a way to sustaina...

TED Studies, created in collaboration with Wiley, are curated video collections — supplemented by rich educational materials — for students, educators and self-guided learners. In Climate Change, speakers give talks that boldly illuminate the nature and scale of current-day climate science, policy and ethics. They explore the economics and psych...

Plants are amazing machines -- for millions of years, they've taken carbon dioxide out of the air and stored it underground, keeping a crucial check on the global climate. Plant geneticist Joanne Chory is working to amplify this special ability: with her colleagues at the Salk Plant Molecular and Cellular Biology Laboratory, she's creating plant...

Why is Al Gore optimistic about climate change? In this spirited talk, Gore asks three powerful questions about the man-made forces threatening to destroy our planet -- and the solutions we're designing to combat them. (Featuring Q&A with TED curator Chris Anderson)

Given $50 billion to spend, which would you solve first, AIDS or global warming? Danish political scientist Bjorn Lomborg comes up with surprising answers.

Climate scientist Kate Marvel looks at the big picture of environmental change.

Military leaders have known for millennia that the time to prepare for a challenge is before it hits you, says scientist and retired US Navy officer David Titley. He takes us from the humanitarian catastrophe in Syria to the icy shores of Svalbard to show how the military approaches the threat of climate change, in a refreshingly practical, nonp...

Naomi Oreskes is a historian of science who uses reason to fight climate change denial.

Investor Yossi Vardi is godfather to more than 40 startups, mostly in the jumping Israeli high-tech sector. He's a legendary community-builder, connector and prankster.

James Hansen has made key insights into our global climate -- and inspired a generation of activists and scientists.

Watch the miraculous journey of infant sea turtles as these tiny animals run the gauntlet of predators and harsh conditions. Then in numbers see how human behavior has made their tough lives even more challenging. [Lesson by Scott Gass, directed by Johan Sonestedt and Veronica Wallenberg, narrated by Scott Gass].

Top climate scientist James Hansen tells the story of his involvement in the science of and debate over global climate change. In doing so he outlines the overwhelming evidence that change is happening and why that makes him deeply worried about the future.

Rob Dunbar looks deeply at ancient corals and sediments to study how the climate and the oceans have shifted over the past 50 to 12,000 years -- and how the Antarctic ecosystem is changing right now.

Environmental scientist David Keith proposes a cheap, effective, shocking means to address climate change: What if we injected a huge cloud of ash into the atmosphere to deflect sunlight and heat?

Imagine the hottest day you've ever experienced. Now imagine it's six, 10 or 12 degrees hotter. According to climate researcher Alice Bows-Larkin, that's the type of future in store for us if we don't significantly cut our greenhouse gas emissions now. She suggests that it's time we do things differently—a whole system change, in fact—and seriou...

Climate change is unfair. While rich countries can fight against rising oceans and dying farm fields, poor people around the world are already having their lives upended -- and their human rights threatened -- by killer storms, starvation and the loss of their own lands. Mary Robinson asks us to join the movement for worldwide climate justice.

Sometimes, things get a little buried in our archive of 2,800+ TED Talks. Check out some great ones, unearthed for your viewing pleasure.

Climate change is real, case closed. But there's still a lot we don't understand about it, and the more we know the better chance we have to slow it down. One still-unknown factor: How might clouds play a part? There's a small hope that they could buy us some time to fix things ... or they could make global warming worse. Climate scientist Kate ...

In this passionate call to action, 16-year-old climate activist Greta Thunberg explains why, in August 2018, she walked out of school and organized a strike to raise awareness of global warming, protesting outside the Swedish parliament and grabbing the world's attention. "The climate crisis has already been solved. We already have all the facts...

We all know about the climate crisis. We all want to stay informed — but the information can be overwhelming. Watch these talks to hear what’s at stake and find out what's being done.