Global warming caused by human activities. Whether burning coal and fuel. Including chemical composition of greenhouse gases that humans use. And many others, such as the burning of forests and deforestation. Resulted in the increase of greenhouse gases. Cause effects such as unusual weather conditions from the original. More severe natural disasters, floods, earthquakes, severe storms. Unusual heat until someone died. Ice melted, sea level rise. We can help reduce heat disease by planting trees. Reduce the use of plastic bags to reduce unnecessary power consumption