Why is the world warming?

Human activities are causing global temperatures to rise, including more intense heat waves and rising sea levels. The situation is likely to worsen in the coming decades, but scientists say urgent action can limit the worst effects of climate change.

What is climate change?

Climate change is a long-term development of average temperatures and weather conditions on Earth. Over the past decade, the world has been on average about 1.2°C warmer than at the end of the 19th century. (More on BBC.com)