From Gary Heayn
It seems odd to try to come up with weird and wonderful methods to “pull” carbon dioxide out of the atmosphere (29 March, p 36, for example). We already have extremely efficient, tried and tested, solar-powered devices that can easily be produced in large numbers with little investment.
They are called plants, and probably the most practical form of this “device” would be single-celled algae which, with a bit of common-sense engineering, can easily be manipulated and farmed. The only by-product would be large quantities of hydrocarbons. Now, if only we could think of a use for these…
Rochdale, Lancashire, UK
