increase in the Earth's temperature caused by human activities that release greenhouse gases into the atmosphere. It has many consequences, including: 

Rising sea levels: Low-lying cities, islands, and fresh water marshlands are being inundated by seawater. 

Extreme weather: Climate patterns are changing, leading to droughts, fires, and flooding in different areas. 

Melting ice caps and glaciers: This threatens polar bears and other animals, and reduces their feeding season. 

Loss of animal habitats: Animal populations are declining as their habitats are lost. 

Negative impact on human health: Global warming can have a negative impact on human health. 

Negative impact on agriculture: Global warming can negatively impact agriculture. 

Some human activities that contribute to global warming include:

Burning fossil fuels

Deforestation

Using hot water

Using ordinary light bulbs

Leaving electronic devices unattended