"Peter Jason" wrote in news:frerv0$65e$1
@otis.netspace.net.au:

Recently I posted about the possibility of
growing floating biomass in the oceans
(Sagasso Sea?) to supply extra oil for
general use.
http://en.wikipedia.org/wiki/Sargassum

In the oceans there are minerals/CO2/water,
and the result could be harvested
mechanically.


If the oceans were such rich grounds for growing harvestable algae, they
would be full of it already. Sea water is notably poor in iron, a very
important nutrient that can limit growth. Phosphorus is also in short
supply.

Sean


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