Seawater near Japan's crippled Fukukshima nuclear plant is said to have a higher level of radioactive iodine than previously reported.

The UK government funds research that considers ways to cut emissions of methane, a potent greenhouse gas, from the nation's livestock.

Japan is to decommission four of the quake-hit reactors at the Fukushima Daiichi nuclear plant, after failing to bring them under control.

Pregnant mares are likely to abort their foetus if they are kept close to other stallions, researchers in the Czech Republic have discovered.

Containing a presumed leak of water from the "torus" of reactor 2 at the Fukushima nuclear plant is a priority, says a leading expert.

President Barack Obama sets out an ambitious target to reduce US oil imports by one-third by 2025.