Milk in parts of Ukraine has radioactivity levels up to five times over the country’s official safe limit, new research shows.

While images of crimson-colored lava erupting from Hawaii’s Kilauea volcano continue to captivate the world, one of the greatest concerns is toxic sulfur dioxide gas emanating from every new fissure in the volcano.

Sulfur dioxide (SO2), which mixes with other air pollutants, can harm the eyes, skin and the respiratory system. At a minimum, it causes short-term breathing difficulties and is particularly hazardous for those with conditions like asthma or emphysema.

The amount of mercury extracted from the sea by industrial fishing has grown steadily since the 1950s, potentially increasing mercury exposure among the populations of several coastal and island nations to levels that are unsafe for fetal development.

Traditional insecticides are killers: they not only kill pests, they also endanger bees and other beneficial insects, as well as affecting biodiversity in soils, lakes, rivers and seas. A team from the Technical University of Munich (TUM) has now developed an alternative: A biodegradable agent that keeps pests at bay without poisoning them.

For nearly 20 years, TRAX light rail trains have shuttled riders up and down the Salt Lake Valley, saving countless car trips and sparing Salt Lake’s air tons upon tons of petroleum-powered pollutants.

For decades, intensive groundwater pumping has caused ground beneath California’s San Joaquin Valley to sink, damaging infrastructure. Now research published in the journal Nature Communications suggests that as pumping makes the ground sink, it also unleashes an invisible threat to human health and food production: It allows arsenic to move into groundwater aquifers that supply drinking water for 1 million people and irrigation for crops in some of the nation’s richest farmland.

British Columbia’s premier shellfish farming region is heavily contaminated with microplastics, according to a new Simon Fraser University study.

Since the 1960s, scientists at the University of Vermont have been documenting the decline of red spruce trees, casualties of the damage caused by acid rain on northeastern forests.

But now, surprising new research shows that red spruce are making a comeback—and that a combination of reduced pollution mandated by the 1990 Amendments to the Clean Air Act and changing climate are behind the resurgence.

A pilot whale that died in Thailand last week had more than 17 pounds of plastic waste in its stomach, including more than 80 plastic bags, according to an autopsy performed by Thailand’s Department of Marine and Coastal Resources, Agence France-Presse reported.

What would happen if all petrol and diesel-powered vehicles were removed from a smaller European city? Up to 4% of all premature deaths could be prevented, according to a new study from Lund University in Sweden. The researchers used Malmö, Sweden, as a case study to calculate the health costs of inner city traffic.