Mayor Michael Nutter is being honored this year by the Sierra Club for his Greenworks Philadelphia program, the conservation organization announced Tuesday.
Nutter will receive the Distinguished Achievement Award given to public servants who take "a particular action of singular importance to conservation."
Established during Nutter's first term in 2009, the Greenworks program set a series of sustainability targets in the areas of energy, environment and equity in an attempt to make Philadelphia the country's greenest city by 2015.
Also being honored by the Sierra Club this year is Los Angeles Mayor Antonio Villaraigosa, who is receiving the Edgar Wayburn Award for leading Los Angeles to become the first U.S. city to stop using electricity generated by coal-fired power plants.
The awards will be presented Saturday at a ceremony in San Francisco.