We know that global warming caused by greenhouse gases in the atmosphere, too. Greenhouse gases include carbon dioxide, an important one. It is caused by the burning of fuel to use. People use a lot of gas to power, how much more energy we use, it is even more greenhouse gases into the close. If we consider the use of energy in the last half century ago were also found to be consistent with the increasing amount of carbon dioxide in the air as well. And is unlikely to decline in the near future. It's a problem that we must start from our homes, such as reducing the use of plastic bags. Reduce energy consumption from oil to natural materials, because if we are not selfish. Many problems to come Whether it is a phenomenon that occurs simultaneously.