Global warming is the long-term increase in the Earth’s average temperature, mainly caused by the buildup of greenhouse gases (such as carbon dioxide and methane) in the atmosphere.
These gases trap heat from the sun, making the planet warmer. The major cause of global warming is human activities, especially:
Burning fossil fuels (coal, oil, and gas)
Deforestation
Industrial pollution
According to the Intergovernmental Panel on Climate Change, global warming leads to effects such as:
Rising sea levels
More extreme weather (heatwaves, floods, droughts)
Melting glaciers and polar ice
Changes in ecosystems and wildlife
In simple terms:
Global warming means the Earth is getting hotter over time, mainly because of human activities that increase heat-trapping gases in the atmosphere.