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Coal trains and terminal operations add a significant amount of fine particulate matter (PM2.5) pollution to urban areas, more so than other freight or passenger trains, according to a study conducted in Richmond, California, by the University of California, Davis.

In the race to make the world more livable for people and nature, progress on land is outpacing successes in the seas, raising red flags that wealthier countries’ advantages may be upsetting a balance, a Michigan State University study shows.

The West Antarctic Ice Sheet is melting rapidly, raising concerns it could cross a tipping point of irreversible retreat in the next few decades if global temperatures rise 1.5 to 2.0 degrees Celsius (2.7 to 3.8 degrees Fahrenheit) above preindustrial levels.

Scientists believe little more than 10% of the species that live in our seas have been found and that around two million remain undiscovered.

Joan Casey lived through frequent wildfire-season power outages when she lived in northern California.