"Andy Champ" wrote in message
. uk...


Perhaps you can tell us the cost of cleaning up the atmosphere after
burning all those fossil fuels we've been doing for the past couple of
hundred years?

If you discount all the environmental impacts of farming plankton then it
may well be a few million a year to remove an awful lot of CO2 from the
atmosphere.
The trouble is nobody knows what will happen.
However its all "natural" so what can go wrong?