Climate change: Is the world warming faster than expected?

Climate records have tumbled in 2023.

There have been historically high sea temperatures, worrying lows in Antarctic sea-ice, and extreme weather events hitting every continent - the latest being an "unbearable" heatwave in Brazil.

It's now "virtually certain" that 2023 will be the hottest year on record. That's something that no major climate science body expected at the start of the year.

Scientists have long known that temperatures will continue to rise as humans keep releasing record amounts of planet-heating greenhouse gases like carbon dioxide, mainly through burning fossil fuels. This is the main cause of global warming.