Before revision: At the Toronto Conference on the Changing Atmosphere: Implications for Global Security, hosted by Canada in Toronto, Ontario, starting on June 27 to June 30 , 1988, the 300 participants—including policy makers, international scientists, non-governmental and governmental organizations, and United Nations organizations—issued a warning at the conclusion of the conference that humans had unintentionally triggered uncontrolled changes to the atmosphere that if left unchecked could ultimately lead to "consequences could be second only to a global nuclear war."
After revision: At the Toronto Conference on the Changing Atmosphere: Implications for Global SecurityJune hosted by Canada in Toronto, Ontario, starting on 27 to 30 , 1988, the 300 participants—including policy makers, international scientists, non-governmental and governmental organizations, and United Nations organizations—issued a warning at the conclusion of the conference that humans had unintentionally triggered uncontrolled changes to the atmosphere that if left unchecked could ultimately lead to "consequences could be second only to a global nuclear war."