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Also on MNN:
• Overfishing: Are there really plenty of fish in the sea?
Introduction image: Nassau grouper/National Oceanic and Atmospheric Administration
Thoughtful gifts can be experiences, time or even a special treat.
If you really want to reduce your footprint, have fewer kids and ditch your car.
Give your time, your money or your expertise — and make a difference.
These easy things can decrease the amount of plastic trash you make.
From CPR to car repair, these building blocks create safe, successful adults.