Global warming is caused by human activities such as burning fossil fuels and deforestation, which increase carbon dioxide and other greenhouse gas emissions. As a result, average temperatures have risen and Arctic ice is disappearing rapidly. If warming continues unchecked, it could cause sea levels to rise and natural disasters to become more frequent and intense, threatening coastal cities and ecosystems. However, individuals can help address the problem through everyday actions like using appliances efficiently, driving less, and conserving energy and resources.