Or if you've got a green thumb, you could use your old ... All you need is your old fish tank, some pea gravel or fancy ...

This series of images shows the growth of juvenile kelp plants on ‘green gravel’ in the laboratory. Paz-Lacavex seeds small rocks with kelp spores to make green gravel in the laboratory. A tiny kelp ...

Thousands of homeowners from Sun City to Mesa spread generous blankets of pea gravel on their yards, glued it down and painted it green to look like a lawn — at least from an airplane.

But with the green gravel technology, scientists are hoping they can give kelp in Nova Scotia and beyond a better chance at long-term survival. The people involved in the green gravel project ...