[Timetrvlr]

The famous "White Cliffs of Dover" in England are made of chalk, calcium carbonate. Another form of calcium carbonate is limestone. That's how nature sequesters carbon, countless little exoskeletons of marine life, diatoms, sift down to the sea floor and pile up in thick layers.

We can reverse global warming by helping sea life capture more carbon. All plants use carbon dioxide and exhale oxygen. Tiny little plants in the sea can capture far more carbon than all the plants on land. When they die, they fall to the sea floor building up layers of calcium carbonate.

Many areas of the sea are "deserts", supporting very little life. In most cases, these "deserts" have enough nutrients except for one vital trace element, iron. Nature supplies much of the oceans with iron via dust storms off the Sahara and other deserts around the world.

Still, there are vast areas of the seas that are iron-poor. Some in the science community have suggested spreading ordinary iron dust in these dead zones to stimulate phytoplankton growth and have actually done it in a few test areas. It did stimulate phytoplankton growth but others in the science community are horrified at what they perceive to be meddling in natural processes.

I don't understand this argument; it seems to me that we have already meddled far too much by adding so much CO2 to our atmosphere! I think we should clean up our mess.