Air pollutants are harming people all over the world, and can harm anyone, even in their own home. Millions of people have died all over the world because of the harmful emissions coming from the many power plants all over the world. It's not unrealistic to suggest that the air everyone needs will barely be breathable, if at all. In many places in China, people have to wear masks because their air is so polluted that they can't go outside without them or else they'll face terrible consequences to their health. If nothing is done, then this could be the future of the whole world, a future where the air itself is toxic.