Global warming is a popular topic around the world. The changeable climate which dangerous the world life. The issue we need to face is human activities which increase the concentrations of the greenhouse effect. The most reason is from fossil fuels, agriculture and land clearing. As people develop the places, cutting down the tree, more sun’s energy is absorbed and reradiated by greenhouses gases. All of them cause the temperature increasing. Now, we realised that we need to protect our places or we will lose it. Many people try to reduce development and use more clean energy such as renewable energy. I would talk about the energy and pollution, while I will also give some new technology to reduce the pollution.