We all have heard the buzzed around the word "emissions" but it shouldn't be assumed we all know exactly what it is. I found a great definition in Natural Health Magazine last month.
"Emissions: When gasoline and coal burn, they bond with oxygen in the air- so they become heavier. (For example, one gallon of gasoline weighs six pounds, but when burned, it produces more than 19 pounds of carbon dioxide gas.) That's why it doesn't take much fuel to cause air pollution- and why small changes, like turning off lights when not in use, can improve air quality."