environmental awareness timeline By reecemagill 1804 Human Population 1 Billion 1925 Human Population 2 Billion 1932 Minamata Disaster 1942 Love Canal 1949 Gulf Of Mexico dead zone 1959 Human Population 3 Billion 1962 Rachel Carson's Silent Spring Published 1970 Clean Air Act 1973 Human Population 4 Billion 1973 Endangered Species Act 1976 Stockholm Conference 1984 Bhopal disaster 1986 Chernobyl meltdown 1987 Montreal Protocol 1987 Human Population 5 Billion 1996 Kyoto protocol 1999 Human Population 6 Billion 2003 Hurricane Katrina 2006 An Inconvenient Truth released 2010 Deepwater Horizon oil spill 2011 Human Population 7 Billion 2019 Australian Bushfires 2022 Human Population 8 Billion 2022 Pakistan floods 2023 California fires 2023 Coyhaique Fire 2024 Ashville floods 2025 Cities