The 10 years to the end of 2019 have been confirmed as the hottest decade by three global agencies.
This year's climate change was associated with Australian forest fires, heavy rains in Indonesia and record temperatures in Europe. But what is climate change?
Rebecca Morelle, BBC Global Science correspondent, explains.
This video is part of Our Planet Matters, a special one-year series dealing with climate change.
Time-lapse images captured lightning bolts that swirled in dark clouds around the summit of the Taal volcano in the Philippines.
The volcano had spewed out a huge cloud of ash and evacuated thousands of people.
Authorities said the cloud of the Taal volcano soared into the sky.
Read more: Taal volcano: lava spits like a feared "dangerous eruption"
Here's a test question: What do the use of road navigation systems, global time consistency and the availability of accurate stock market data have in common? The answer is that everyone relies on working satellites. However, an increasing amount of environmentally harmful waste from space poses a risk to all of these services. For example, a Japanese company, Astroscale, was working on ways to remove space debris. The founder and CEO, Nobu Okada, explains.
Video by Adam Tyrrell and Pamela Parker
Here's a test question: What do the use of road navigation systems, global time consistency and the availability of accurate stock market data have in common? The answer is that everyone relies on working satellites. However, an increasing amount of environmentally harmful waste in space poses a risk to all of these services. For example, a Japanese company, Astroscale, was working on ways to remove space debris. The founder and CEO, Nobu Okada, explains.
Video by Adam Tyrrell and Pamela Parker
Here's a test question: What do the use of road navigation systems, global time consistency, and the availability of accurate stock market data have in common? The answer is that everyone relies on working satellites. However, an increasing amount of environmentally harmful waste from space poses a risk to all of these services. For example, a Japanese company, Astroscale, was working on ways to remove space debris. The founder and CEO, Nobu Okada, explains.
Video by Adam Tyrrell and Pamela Parker
A former Indian software analyst who is now an emerging star in the opera world has written a new "national anthem" for Mars.
Oscar Castellino was commissioned to give the Red Planet his own anthem for the United Kingdom's Mars Society to promote the idea that people who live there need their own musical identity.
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Mark Carney said the financial sector has started to curb fossil fuel investments. but slowly