What happens to high mountain ecosystems when you take away air pollution? Not much, not very quickly.

Simulated on-road testing shows the engine maintains near-zero emissions during all duty cycles.

Until renewable sources of energy like wind or solar become more reliable and less expensive, people worldwide remain reliant on fossil fuels for transportation and energy. This means that if people want to reduce greenhouse gas emissions, there need to be better ways of mitigating the effects of extracting and burning oil and gas.

UC Berkeley engineers have created a new way to remove contaminants from storm water, potentially addressing the needs of water-stressed communities that are searching for ways to tap the abundant and yet underused source of fresh drinking water.

New study: Ozone levels higher across China than in other countries tracking the air pollutant.

Experiment shows microplastics aggregate with natural particles.

Study finds lost revenue can be millions of dollars annually, suggests ways to quantify haze-related reductions in solar panel output.

When spraying paint or coatings onto a surface, or fertilizers or pesticides onto crops, the size of the droplets makes a big difference. Bigger drops will drift less in the wind, allowing them to strike their intended targets more accurately, but smaller droplets are more likely to stick when they land instead of bouncing off.

Levels of some persistent organic pollutants (POPs) regulated by the Stockholm Convention are decreasing in the Arctic.

Rising levels of carbon dioxide (CO2) from human activity are making staple crops such as rice and wheat less nutritious and could result in 175 million people becoming zinc deficient and 122 million people becoming protein deficient by 2050.