Madam, – John Gibbons’s article on minimising the ongoing environmental damage of automotive fuels by use of renewable, zero-impact electrical energy stored in batteries made for interesting reading (Opinion, January 28th). Perhaps Mr Gibbons could provide a counterpoint by explaining how the vast number of batteries to be utilised, requiring the use of finite resources extracted from the earth, and processed in an environmentally unfriendly manner, represent a best practice approach? – Yours, etc,