The increasing temperature of greenhouse gas could cause global warming as well. There are few ways to reduce greenhouse gases. Firstly, obey to the 3R Principle, Reduce, Reuse, and Recycle. Buying products with minimal packaging will help to reduce waste. By reducing half of your household waste, you can save 2400 pounds of carbon dioxide annually. Secondly, reduce the using of heat and air conditioning. Adding insulation to your wall and attic can lower your heating costs more than 25 percent, by reducing the amount energy you have to heat and cool your home. Turn down the heat while you are sleeping at night or away during the day, keep temperatures moderate at all the times. And finally, the last step will be using hot water. By adjusting the water heater at 120 degrees to save energy, and wrap it in an insulating blanket if it is more than 5 years old. Buy low-flow showerheads to save hot water and about 350 pound of carbon dioxide yearly. Next, we wash our clothes in warm or cold water to reduce the usage of hot water and the energy required to produce it. In these cases, could save at least 500 pounds of carbon dioxide annually in every household. Furthermore, for those people who have a dishwasher in their home can use the energy-saving on the dishwasher and let the dishes air-dry.