Global warming refers to the gradual increase in average air and water temperatures worldwide due to the accumulation of greenhouse gases like carbon dioxide and methane in the atmosphere. If left unaddressed, the rising temperatures will significantly impact life on Earth. The primary cause of global warming is human activities that have increased greenhouse gas concentrations in the atmosphere by around 100% over the last 50 years. Some ways to help stop global warming include reducing waste by recycling, buying energy-efficient appliances and light bulbs, and planting trees which absorb carbon dioxide.