Global warming is caused by both human activities like burning fossil fuels and natural phenomena. It is leading the Earth's surface to gradually increase in temperature over time. If left unaddressed, global warming will have serious environmental effects such as rising sea levels from melting ice caps and more extreme weather events. However, actions like using renewable energy and more fuel-efficient vehicles can help reduce pollution and slow the pace of global warming. While changes may be costly, working together globally to address this issue could prevent it from becoming a serious problem.