Note that he said CO not CO2. Carbon monoxide is produced from incomplete combustion, which two stroke engines are notorious for. Leaf blowers lacking catal

Note that he said CO not CO2. Carbon monoxide is produced from incomplete combustion, which two stroke engines are notorious for. Leaf blowers lacking catalytic converters (which as the name suggests, catalyze the conversion of incomplete combustion byproducts like CO) only make this worse.