Pollution

pol·lu·tion  

/pəˈlo͞oSHən/

Noun

The presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects. Pollution in our air is a huge problem. It is caused from emissions of CO2 and other chemicals into the air. Cars, trains, planes, factories, and many other industrialized cities give off millions of tons of CO2 each year. I found a list of countries that produce the most CO2 per year. The countries are: China, United States, Russia, India, Japan, Germany, Canada  UK, South Korea, and Iran. All theses countries need to work on cutting back on CO2 emissions, because our 1 Earth cannot continue to thrive with the billions of CO2 emissions produced by these countries.