Millions of abandoned fossil fuel wells could be refitted to provide clean, low-carbon geothermal energy.

We all know we need to eat less meat – here are the hard numbers.

We may trigger hyperwarming that transforms the planet into a hothouse with tropical temperatures and lush forests close to the poles.

The origins of our best drug against malaria have long been a mystery. Meet Tu Youyou, who scoured ancient Chinese medical texts for the cure.

Unsafe injections kill 1.3 million people a year, says former "spoilt brat" Marc Koska, who is on a mission to stop syringe reuse.

When extreme weather strikes, somebody, somewhere always asks about a link to climate change. It's time we gave straight answers.

Giant ribbons of moisture around the globe are behind many floods, and their effects could be amplified by climate change

A claim that global warming caused the 2010 Russian heatwave could bring closer the day when climate victims can sue oil firms.

There's a way to curb carbon emissions without having to wait for governments to forge a global climate deal. (Editorial)

The world could be on the brink of a trade war over European Union efforts to impose carbon charges on the emissions of all planes landing or taking off within the EU.