1. Go to the woods. Bring home a cone.
2. Put the cone in a pot – so that most of it stands out.
3. Pour it every day with a small amount of water, as excess water makes the cones rot.
4. After some time, a tiny tree will appear.
5. Congratulations – they just started oxygen production and you have a piece of forest in your own home.
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You’re doing something for nature, and you’ll see what nature does for you….. 
Perfect project for the kids too!