Pivotal international conference (though nothing much came directly out of it, except the United Nations Environment Program).
Only two world leaders there – Olof Palme (Prime Minister of Sweden) and Indira Gandhi.
Maurice Strong ran it, mostly. He was also key in Rio, 20 years later, giving rise to all the One World Government stuff..
Various books were written before and after.
Carbon dioxide got a brief look in here and there in those books…