Houston-based Waste Management has been named to Ethisphere Institute’s 2008 list of the world’s most ethical companies. The institute reviewed the codes of ethics, litigation and regulatory infraction histories, and business practices for more than 10,000 companies.

“It is an honor for Waste Management to be ranked so highly by Ethisphere, and it is an indicator of how strongly our corporate culture values ethics, diversity and sustainability,” said David Steiner, CEO of Waste Management, in a press release. “Leadership and values start at the top of any company, and ethical companies operate in a way that contributes to the success of their business and the communities they serve.”