Explainers

The urban heat island effect is a phenomenon whereby cities experience higher air temperatures than the surrounding countryside, making them more vulnerable to a warming Earth.

Cities concentrate people into small areas for good reason, but this makes them major sources of greenhouse gases and uniquely vulnerable to climate risks.

Nuclear energy is low-carbon energy made by breaking the bonds that hold particles together inside an atom.

Fusion energy is the source of carbon-free energy at the center of stars, including our own sun.

Freight transportation moves billions of tons of cargo around the world each year. Nearly all freight transportation runs on oil and gas.