Such a problem is a big problem that all countries give priority to.And measures to regulate the amount of carbon dioxide gas emissions up to the air, such as how to limit the number of cars, etc.
Such problems are a big problem for all countries to focus measures and controls the amount of carbon dioxide released into the air as a way to limit the number of cars and so on.
Such a problem is a big problem that all countries to focus.And control measures of carbon dioxide released into the air, such as how to limit the number of automobile, etc.