Broda became a member of the
Pugwash Movement, in support of
nuclear disarmament in 1947. He also worked to propagate the use of
solar energy, and in 1979 he was awarded the Austrian Award for the Protection of Nature, for his initiatives concerning a projected power plant in
Dürnstein,
Wachau. He was given an honorary funeral at the
Zentralfriedhof in Vienna. In spite of his anti-nuclear weapons stance, Broda has been accused of being an alleged spy and a resource of providing classified information passed from the
British contribution to the American-led
Manhattan Project that greatly aided the
Soviet program of nuclear weapons. In
2019,
Alexander Vassiliev, the Austrian-British journalist, accused Broda of conducting an espionage for the Soviet Union during his research time in the Cavendish Laboratory in England in a book based upon the evidences formerly undisclosed
KGB archives. According to the book, the Soviet KGB reports from August 1943 suggest that Broda— codenamed: "
ERIC"— was the main Russian source of information on the British side of the American-led Manhattan project at the earliest times. Broda was known to the British
MI5 which had long suspected that he was
Alan May's recruiter, but the
British prosecutors did not had the conclusive proofs to charge him. == Works ==