We already know how much Leo and Brad care about saving our planet, but there are tons of other celebs that are just as passionate about eco-friendliness. Natalie Portman, Chloe Sevigny and Kyra Sedgwick teamed up in the name of the environment to create this PSA that shows how we can make a difference just by changing a light bulb. Casa told us about how these cool compact fluorescent lights save energy and last longer than regular bulbs. Plus, the statistics used in the PSA are pretty convincing if you're not already on the way to the hardware store to pickup a box.
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