In Japan, a smelly waste product is being reimagined as a potential clean fuel of the future that is powering cars and tractors.

Major oil spills can be catastrophic for seabirds and marine life. Nearly 15 years on from the biggest marine spill in history, are we any better at cleaning up oil at sea?

Several old fossil fuel wells in the north of England were going to be used for fracking. Instead, they may now be a template for the UK's geothermal industry.

Some species of birds like geese save energy by flying in close formation. Airliners could use a similar trick to burn less fuel.

US President Donald Trump says that wind farms harm birds and whales. Scientists weigh wind power's impacts on wildlife against those of oil and gas.

The riches thought to lie beneath Greenland's icy terrain have been coveted for more than a century. But how easy are they to access, and will climate change make any difference?

Global temperatures rose and extreme weather ramped up, but there were also some significant breakthroughs for the climate this year.

Should rich countries and fossil fuel companies pay for the climate losses and damages they have caused?