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Inhaling dust that contains fly ash particles from coal combustion has been linked to lung and heart disease, cancer, nervous system disorders and other ill effects. But tracking the presence of coal ash in dust has been a challenge for scientists.

The ongoing transition from coal to natural gas and renewables in the U.S. electricity sector is dramatically reducing the industry’s water use, a new 91ÉçÇø¸£Àû study finds.

With the Environmental Protection Agency (EPA) poised to loosen coal ash rules for dry onsite storage and large fill projects, a new study from 91ÉçÇø¸£Àû finds that leaving those contaminants exposed may significantly heighten the risk of toxic contamination to nearby soil and waterways.

Allowing coal ash to be spread on soil or stored in unlined pits and landfills will raise the risk that several toxic elements, including carcinogenic hexavalent chromium, could leach out of the coal ash and contaminate nearby water supplies across the U.S., according to preliminary findings from a new 91ÉçÇø¸£Àû study.

Thousands of marine species could be at risk if a new United Nations high-seas biodiversity treaty, now being negotiated in New York, does not include measures to address the management of all fish species in international waters, not just the commercial species, warns an analysis by American, Dutch, Swiss and French researchers.

Algae may hold the key to helping scientists devise a negative-emissions technology that produces electricity and provides protein for millions of people worldwide while simultaneously removing substantial amounts of carbon dioxide from Earth’s atmosphere and reducing deforestation.