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NBC is holding its annual "Green Week" Nov. 15-22.

Al Gore will make his second appearance in a green-centric story line on 30 Rock, where Jack Donaghy (Alec Baldwin) must ask the T.G.S. staff to reduce its carbon footprint. Kenneth the page is put in charge of making sure the staff sticks to their goal.

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"These green episodes are a fun and entertaining way to raise environmental awareness," network executive Beth Colleton said. "We are also very committed to green production practices at NBC Universal."

She said they've published green production guides for TV and film hoping they will encourage a more eco-friendly industry.

NBC released this list of other "green" highlights: