The coolant is also the leading cause of accidental poisonings of animals. It is estimated that tens of thousands of pets and wild animals die each year from ingesting radiator fluid that has spilled, leaked or been carelessly disposed. Famous examples cited include the death in 1992 of a rare California condor in a remote sanctuary in the Los Padres National Forest and a cougar death in 1995 at a wildlife center. The toxicity of antifreeze has been known for several years. Animal-rights groups have urged manufacturers to add an ingredient that would mask the sweetness, but so far no manufacturer has done so.
Propylene glycol is still poisonous, but far less so than conventional antifreeze.
In 1995, the American Zoo and Aquarium Association launched a national campaign to educate the public about the dangers of antifreeze. Zoos across the country presented educational programs to the public and switched the type of antifreeze they used in their vehicles from the conventional formula to the less-toxic formula. These are admirable steps in the right direction, but the brunt of the work still falls on our shoulders. As consumers, we must cast our votes for less-toxic antifreeze and brake fluid formulas through the choices we make at automotive centers. Urge stores and mechanics to carry and use safer brands.