Alright, all you soy sipping, yogurt eating, diet doing, hybrid driving, environmentally eccentric folks from Vancouver: listen up. You may be causing more damage to the environment than you already know. How so? Your Audi's air filter, that's how. Yes, it is true: if you keep your car long enough you will be performing under-the-hood maintenance which will include changing your air filter at least once a year. Keep that same car for ten years and that is ten years of stuff clogging North America's landfills. And you call yourself earth friendly? Tsk, tsk! All kidding aside, there is an environmentally friendly way whereby if you follow just one small, but important step you can achieve oneness with nature, if not with your wallet: replace your car's disposable air filter one final time with a reusable air filter. Reusable air filters, or performance air filters as some like to call them, are a true "green" item. No, the air filter isn't green itself, but the result is the same effect: you can replace your car's air filter one final time with a reusable air filter that should outlast your car. Environmentally friendly air filters are on the market and they have several key benefits to them, including: