Elena Marsh

Environment & Climate Correspondent

Elena Marsh reports on climate, energy and conservation, with a focus on the science and policy shaping the planet's future.

32 articles

The Greenhouse Effect, Explained

The greenhouse effect is the natural warming that happens when gases in the atmosphere trap heat from the Earth. Here is how it…

Elena Marsh · · 5 min read

What Is Rewilding?

Rewilding restores natural processes and lets nature take the lead in repairing ecosystems. Here are its core principles…

Elena Marsh · · 5 min read

The Circular Economy, Explained

The circular economy keeps materials in use for as long as possible instead of making, using and throwing away. Here is what it…

Elena Marsh · · 5 min read

Carbon Offsetting Explained

Carbon offsetting lets you pay for emissions cuts or removals elsewhere to balance your own. Here is how it works, why quality…

Elena Marsh · · 5 min read

What Is Net Zero?

Net zero means cutting greenhouse gas emissions as close to zero as possible and balancing the rest by removing an equal amount…

Elena Marsh · · 5 min read

What Is Light Pollution?

Light pollution is excessive or misdirected artificial light at night. Here is what causes it, why it harms the night sky…

Elena Marsh · · 5 min read