ecology timeline By ki123 Jan 18, 1804 1 billion people 1927 2 billion 1956 Minamata disaster 1960 3 billion1960 1962 Rachel Carson’s Silent Spring Published 1972 Stockholm Conference 1973 Rachel Carson’s Silent Spring Published 1974 4 billion 1977 Love Canal 1977 Kyoto protocol 1984 Bhopal disaster 1986 Chernobyl meltdown 1987 5 billion 1987 Montreal Protocol 1999 6 billion 2006 Documentary film An Inconvenient Truth released 2011 7 billion 2022 8 billion