We've all learned to beware of greenwashing -- the corporate practice of touting green bona fides while dumping poison in our air and water or tearing up wilderness for profits. But there are some well-known corporate giants that have managed to make a buck (lots of them, actually) while genuinely embracing sustainability. They might not be perfect in every area, but they're changing the corporate culture and showing that green isn't just the color of money.

In this ongoing series, OnEarth contributor Adam Aston, the former energy and environment editor at BusinessWeek, talks to leading executives at top companies about how they're pushing their businesses and industries toward true sustainability.