TILclimate MIT Environmental Solutions Initiative

The landmark Paris Agreement of 2015 gave the world a shared target for halting climate change: that global warming should stop well short of 2 degrees Celsius. But how did that target come about, and what exactly does it mean?

The Earth naturally absorbs some of our climate pollution from burning fossil fuels. But how much, and how fast?

Today, companies are storing millions of tons of carbon dioxide underground every year to prevent this climate pollution from warming the planet. In the future it might be billions of tons. But is it dangerous to pump so much liquefied carbon below our feet?

What if there was a way to continue using fossil fuels for energy without emitting CO2 into the atmosphere? To prepare for a new listener question about carbon capture, we're re-airing this season two episode.

Is hydrogen fuel a climate solution? That depends on how you produce it.

Just 20 years ago, hydrogen cars and battery electric cars were pretty evenly matched as clean alternatives to gas-powered vehicles. But today, batteries are way ahead: the big car companies are rapidly electrifying their lineups, while only a few hydrogen cars are available. What happened?