Green technologies are available

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Editor;

Re: Thailand should lead the way in solar energy (PM Mailbag Friday, 26 February 2016) – Ryan: “Some European countries use body heat trapped in their trains together with heat from the rails to generate enough power to be used in the changing of Signals, Points Etc.”

Would you have reference? I don’t know of any technology that can get useful and usable energy from body heat.

“I cannot see an alternate method for the firing of the steel works blast furnace without the mining of fossil fuels.”

Green technologies are available for making iron and steel.

Stuart21