Is algae the new kale?—and 4 more captivating environment reads.

As the global population inches toward 10 billion and climate change threatens existing food security, versatile, nutritious algae is entering the stage.

Some measure seasonal shifts by Earth’s position relative to the sun, while others use annual temperature cycles.

Not all environmental claims are created equally. Here’s how consumers can spot misleading labels.

We’ve added a billion people in just 12 years. The implications for the planet—and our own welfare—hinge on how we tackle climate change.