Global warming is defined as an increase in the average temperature of the earth caused by human activities that produce greenhouse gas emissions. The main causes of global warming include the burning of fossil fuels for industrialization and electricity production, as well as agricultural practices like deforestation. Effects of global warming include rising sea levels from melting ice caps, more extreme weather events, and disruption of biodiversity. Actions that can help reduce global warming include transitioning to renewable energy sources, reducing electricity usage, recycling, and planting more trees to absorb carbon dioxide.