June 1 — US Announced withdrawl from Paris Climate Agreement (2017)
June 2 — Edwin Way Teale, Nature Writer, Born (1899)
June 2 — Rodne Galicha, Philippine Environmentalist, Born (1979)
June 3 — The World’s First Wilderness Area Established (1924)
June 4 — Gaylord Nelson, Politician and Conservationist, Born (1916)
June 5 — World Environment Day
June 6 — Novarupta Volcano Erupted in Alaska (1912)
June 7 — Thomas Malthus Published His Famous Essay (1798)
June 8 — Bryce Canyon National Park Created (1923)
June 10 — E. O. Wilson, Father of Biodiversity, Born (1929)
June 11 — Jacques Cousteau, Ocean Explorer, Born (1910)
June 12 — Frank Chapman, Dean of American Ornithologists, Born (1864)
June 13 — Ban Ki-moon, UN Secretary-General, Born (1944)
June 14 — Bramble Cay Melomys Went Extinct (2016)
June 16 — Gray Whale Delisted (1994)
June 17 — World Day to Combat Desertification
June 18 — Alexander Wetmore, Dean of American Ornithologists, Born (1866)
June 19 — Feast of the Forest, Palawan, Philippines
June 20 — Great Barrier Reef Protected (1975)
June 21 — World Hydrography Day
June 22 — Cuyahoga River Burst into Flames (1969)
June 23 — Antrarctic Treaty Implemented (1961)
June 23 — Tero Mustonen, Finnish Environmentalist, Born (1976)
June 24 — David McTaggart, Greenpeace Leader, Born (1932)
June 25 — David Douglas, Pioneering Botanist, Born (1799)
June 26 — United Nations Chartered (1945)
June 27 — Tajik National Park Added to World Heritage List (2013)
June 28 — Mark Shand, Asian Elephant Conservationist, Born (1951)