BBC

Could circular runways be the future of air travel? Aviation expert Henk Hesselink of the Netherlands Aerospace Centre believes so.

Extra cost of wind and solar power outweighed by energy saving, says report.

A deadly haze of air pollution over China in 2013 has been linked to the melting of Arctic sea ice.

Access to flower-rich habitats is key to the survival of wild bumblebees, say ecologists.

Hive heists in New Zealand are being blamed on the rising price of Manuka honey.

Soft drinks makers admit more needs to be done to stop people discarding single-use plastic bottles.

Scientists on both sides of the Atlantic have become embroiled in a war of words over energy from trees.

The world's spiders consume between 400 million and 800 million tonnes of primarily insect prey every year, say scientists.

The origins of plants may go back hundreds of millions of years earlier than previously thought, according to fossil evidence.

The ship damaged a large area of one of Indonesia's best coral reefs, in an area dependent on tourism.

B vitamins may offer some protection against particulate pollution, a small human trial suggests.

A giant green sea turtle has been released off the Florida Keys after convalescing from an injury.

Hector Ruiz has made it his mission to convert cars in Mexico City to run on electricity.

A video captures the moment plankton ingest a plastic microfibre.

Scientists say there hasn't been enough time for the corals to recover from damage in 2016.

A trial suggests that an Ebola vaccine could protect gorillas and chimps from the deadly disease.

Russian architect Alexei Umarov thinks his HyperFilter building could be a pollution solution.

Could smelly maps linked to the odours of a city play a role in fighting dirty air? Our environment correspondent Matt McGrath follows his nose.

Security could increasingly rely on smart machines that spot cyber threats rather than on humans.

The mid-air hunting strategy of a tiny fly the size of a grain of rice has been revealed by an international team of scientists.