Per the Washington Post:

From "An Inconvenient Truth" to popularizing the Prius, Hollywood has helped lead the way on some environmental issues. One of the latest initiatives: Cool Change, Fox's company-wide program to reduce the network's impact on global warming. As part of that effort, the seventh season of "24" will take steps to reduce and offset the carbon emissions from the show's production, with the goal of having the season finale be entirely carbon-neutral.

Six Ways Jack Bauer Will Fight Global Warming:

• Travel from one end of LA to another in 15 minutes on a bicycle.
• Replace power-sucking PDA with pad of Post-Its and No. 2 pencil. ("Chloe, send it to my sticky note.")
• Yelling releases excess carbon dioxide into the atmosphere. Interrogations will be conducted via sign language and harsh glaring.
• After torturing terrorist with plugged-in lamp cord, buy carbon offsets to make up for wasted electricity.
• All explosions will be rendered South Park-style with red, yellow, and orange construction paper (recycled).
• Cancel the show because it sucks now anyway.