How we are lowering the carbon impact of our landscaping:
We started a pilot program two years ago to replace the gas engines on our mowers with propane. It was very successful and we have now converted 90% of our entire fleet of mowers to propane. An analysis by M. A. DeLucchi for Argonne National Laboratory concluded that the LPG fuel cycle produces the least amount of greenhouse gases of all the fossil fuel cycles, including that of diesel fuel. The study concluded that “Liquefied petroleum gas, consisting of 95% propane and 5% butane, offers a 20-25% reduction in emissions of greenhouse gas.
Low reactivity. Propane exhaust creates 60-70 percent less smog than the hydrocarbons in gasoline exhaust, according to studies by Southwest Research Institute.
Low air toxics. Propane cuts emissions of toxins and carcinogens like benzene and toluene by up to 96 percent, compared to gasoline, according to studies by Southwest Research Institute.
Ground and surface-water safe. Propane is nontoxic; spills vaporize rather than soaking into soil or water.