To protect our Earth and reduce global warming, the methods should be done immediately as listed below: 1. Higher prices for fossil fuels encourage people to save energy by promoting energy efficient devices and behavior. Government subsidies and taxes can also influence behavior. An advantage of using prices is that they present a constant incentive to innovate. However, using prices can have undesirable side effects, such as imposing a relatively larger burden on the poor. 2. People often do not know how to improve efficiency or reduce emissions. Government can provide them with the information they need to make better choices. 3. Government and industry can support research to demonstrate and improve existing technology, and to develop new technologies that use less energy or emit no carbon dioxide. 4. Develop and use energy sources that emit little or no carbon dioxide such as hydro power, solar power and windmills, as well as other renewable energy sources, emit no carbon dioxide. Burning natural gas emits less carbon dioxide than burning coal or oil. In the future, hydrogen, which emits no carbon dioxide when it is burned, may become a practical fuel. Ways of capturing and storing carbon dioxide might also be developed. 5. We should improve forest and agricultural management because trees can help remove carbon dioxide from the atmosphere and store it in the wood. Methane produced by some agricultural activities like raising cattle should be reduced as well. If we can let the above be done, global warming will no longer be a problem for us human beings.