But when the temperature does rise by a few degrees over the whole globe, there is a possibility that the icecaps will start melting and the level of the oceans will begin to rise.

Teller's speech was made publicly known by Benjamin Franta, "On its 100th birthday in 1959, Edward Teller warned the oil industry about global warming", The Guardian, 1 January 2018. Original source: Allan Nevins et al. (editors), "Energy and Man, A Symposium", Columbia University, published by Appleton-Century-Crofts, New York, 1960; pp. 53-72.