At a press conference today, Twentieth Century Fox and director James Cameron announced a partnership with the Earth Day Network to plant one million trees in honor of Avatar by the end of 2010.

“I am pleased to have the opportunity to share the environmental messages from Avatar through the efforts during the 40th Anniversary of Earth Day and with Earth Day Network,” Cameron said. “Earth Day Network’s commitment and actions to promote a healthy, sustainable planet go hand-in-hand with the themes of Avatar.”

 In case you forgot, turn off your lights for one hour for Earth Hour, 8.30pm, Saturday 27th March 2010.