ranching

Invasive weeds are already a big headache for ranchers, who spend thousands of dollars to get rid of them. New research shows that a changing climate is likely to help many of these weeds thrive.

The world's soil is in trouble. Ecologists say without dramatic changes to how we manage land, vast swathes of grassland are at risk of turning into hard-packed desert. To make sure that doesn't happen, researchers are testing out innovative ways to keep moisture in the soil.