California approves the first US carbon-trading scheme, aimed at cutting greenhouse emissions by allowing firms to buy and sell polluting permits.

Vultures in Africa's Masai Mara reserve have declined by 60%, say scientists, primarily because the birds are being poisoned.

European scientists are planning to launch three satellites to try to measure the movement of ocean currents by tracing their magnetism alone.

Frozen water sprayed from a lake in the US state of Ohio transforms a lighthouse into something more like an ice sculpture.

A subsidiary of the Vedanta mining group in India has cleared forest land apparently in violation of Supreme Court orders, the BBC learns.