Air quality levels in the Chicago area have deteriorated badly on Tuesday thanks to wildfire smoke billowing down from Canada, but one expert has put the impact of those conditions in blunt terms.

President Trump said the head of the EPA is prepared to implement deep staffing and spending cuts as part of the administration's efforts to downsize the executive branch.

Researchers at Beihang University in Beijing have made headway in developing “air-breathing” satellites that could last longer in space, finding that there are ways to reduce the negative ...

Exclusive new modelling, seen by this programme, suggests that 70 per cent of UK households are in areas that breach three World Health Organisation guidelines on dangerous air pollutants, and 97% ...

A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of the arctic blast.