OK, so I didn't who this guy was but interesting (courtesy of Pa) –
Born in Glasgow, trained as a chemist, during the war intercepted German communication about a chemical toxic to insects but not to humans – he called it DDT, and distributed it to the armed forces to kill mosquitoes and lice.
Then helped form the international group called the Club of Rome, for people concerned about unsustainable economic growth – they produced the classic 1970s text "Limits to Growth".
A Scot, a scientist, and an environmentalist – one of the first.