Hurricane Maria slammed into Puerto Rico as the strongest storm to hit the US territory in nearly 90 years, even stronger than Irma.
Desperate parents join police, firefighters and volunteers as they work through the night in a frantic search for dozens of young children feared buried under a Mexico City school.
New technique could help up us move away from reliance on greenhouse gas-emitting fossil fuels.
Airline partners with renewable fuels company to turn household rubbish into jet fuel.
Residents without electricity told it's illegal to use solar power.
The reef faces a major threat in addition to those posed by global warming and rising sea temperatures.
Snow in The Cairngorms has suffered from increasing scarcity in recent years.
The amount of free oxygen on the planet skyrocketed, making the planet ideal for complex life.
Tropical Storm Maria is expected to form into hurricane and hit Caribbean islands.
The week's best photos from around the world, from Hurricane Irma and Mexico earthquake to the Rohingya crisis and Australia's same-sex marriage vote.
Greek authorities have appealed to swimmers to stay away from the beaches in the southern suburbs of Athens after thick black oil began washing up.
The 45-year-old Agia Zoni II sank while anchored off the coast of the island of Salamina (also known as Salamis), close to Greece's main port of Piraeus.
Britain's Defence Minister Michael Fallon said his government's effort was "as good as anybody else's". But is it?
New research suggests Beijing will lead the green energy revolution thanks to ongoing policy support.
At least 91 people were killed by the massive earthquake that struck off the coast of southern Mexico on Thursday (7 September).