Recently, our world s population reached 6 billion people. It s hard to name an exact date, but the United Nations estimated that Child 6 Billion was born Oct. 12. This means we have to think about certain issues, like our air and water quality, and other conditions that may affect Child 6 Billion. Believe it or not, every time you turn on a light switch, you may be making an impact on our air quality.
Energy production is one of the biggest sources of air pollutants in the world.
Fossil fuels such as coal and oil are the world s major source of energy, and they add gases to the air whenever they are burned. These gases threaten people s health, create acid rain and may contribute to global warming. So don t forget to turn off the lights, TV, radio or computer when you re not using them. With Earth s vast oceans, it may seem like our water supply is limitless. But really very little of the world s water is fresh, and only fresh water is fit for drinking and many other uses.