In my opinion, there are three ways to solve global warming. First, we should reduce electricity usage. For example, we must turn all lights when we leave a room or go outside. Also, when we want to turn on an air-conditioner, we should always set it to 25 degrees Celsius. Next, we should take care of forests. For instance, we must try not to cut down trees because deforestation is one factor that can affect global warming. Moreover, if we are free, we should fill our free time with tree planting as reforestation is a good way to keep the planet healthy, and it can greatly help reduce global warming. Finally, we should reduce global warming by taking public transportation. To demonstrate, in case we want to go shopping or travel a short distance, we should take a bus instead of driving a personal car. In addition, if our university is not far from our home, it is better to take the BTS or MRT, so we can save more time and money later. In conclusion, if we follow these three ways, we can reduce global warming for sure.