EcoMowers publishes information about the ecological and other benefits of using reel mowers. Gas powered mowers produce several types of pollutants, including polycyclic aromatic hydrocarbons, ozone precursors, and carbon dioxide. One type of pollutant emitted by lawn mowers is polycyclic aromatic hydrocarbons (PAHs). These are classified as probable carcinogens by the CDC. Testing found that operating a typical gasoline mower with a four-cycle engine produced as much PAH as driving a modern car about 150 km or about 95 miles. And you, as the operator of a gas powered lawn mower, would be most intimately exposed to these harmful chemicals. Reel mowers instead do not partake in this cycle of death and poison.