2021 in the environment and environmental sciences

2021, 2021–2022 Iranian protests, 2021 Canadian census, List of elections in 2021, 2021 Booker Prize, 2021 in sports, Miss Brazil 2021, 2021 in film, Zapad 2021, 2021 heat waves, Miss Hong Kong 2021, 2021 London Broncos season, 2021 Q School, 2021 Pakistani protests, List of 2021 Afghanistan attacks, Microsoft Office 2021, 2021 WNBA playoffs, 2021 NBL pre-season, 2021 in paleomammalogy, 2021 Kabul airlift, 2021 in Palestine, 2021 Wisconsin elections, 2021–22 Scottish Cup, FIBA AfroBasket 2021, 2021–2023 Stagecoach strikes, 2021 Russian census, 2021 Islamic Solidarity Games, 2021–2022 United Kingdom censuses, 2021 NBL–Pilipinas Chairman's Cup, 2021 in UFC, 2021–22 AFC Wimbledon season, 2021 SAFF Championship, 2021–22 Gillingham F.C. season, 2021 European Baseball Championship, 2021 Uttarakhand flood, 2021–2025 Bulgarian political crisis, 2021 Polish speedway season, 2021 Alberta referendum, 2021 Super League season, 2021 Pakistan Super League, Wildfires in 2021

2021 Empress's Cup final, 2021 in Professional Fighters League, 2021–22 Reading F.C. season, 2021 Russia–United States summit, Timeline of the Israeli–Palestinian conflict in 2021, 2021 BC Lions season, 2021 Australian census, 2021 in science, September 2021 Sudanese coup attempt, 2021 Pacific hurricane season, 2021 Tennessee Volunteers football team, 2021 Indian Premier League, 2021 SEC softball tournament, Tornadoes of 2021, 2021 SEA Games, International cricket in 2021–22, 2021 Andhra Pradesh panchayat elections, 2021 G20 Rome summit, 2021 Hormozgan earthquakes, 2021–22 Liga 2 (Indonesia), 2021–22 Stevenage F.C. season, 2021 Nagoya mayoral election, Produce Camp 2021, Planet Prince 2021, 2021–22 Valparaiso Beacons men's basketball team, 2021–22 Scottish Women's Premiership season, 2021 Nandigram Assembly election, 2021–22 Championnat Pro A, 2021–22 Doncaster Rovers F.C. season, PFL 10 (2021), 2021 (song), 2020–2021 Vendée Globe, 2021 Sukma–Bijapur attack, 2021–22 Ashes series, 2021 Africa Cup of Nations, 2021 Austin W Series round, 2021 Zavarovalnica Sava Portorož, 2021 New York state elections, 2021–22 Barnsley F.C. season, Vision 2021, International cricket in 2021, 2021 Città di Forlì II, 2021–22 Southampton F.C. season, 2021 CFL Premier Division, Mukhosh (2021 film), List of The Late Show with Stephen Colbert episodes (2021), 2021–22 Al Hilal SFC season, 2021–22 CCHA season, 2021 in the British Virgin Islands, 2021–22 Walsall F.C. season

2021, 2021–2022 Iranian protests, 2021 Canadian census, List of elections in 2021, 2021 Booker Prize, 2021 in sports, Miss Brazil 2021, 2021 in film, Zapad 2021, 2021 heat waves, Miss Hong Kong 2021, 2021 London Broncos season, 2021 Q School, 2021 Pakistani protests, List of 2021 Afghanistan attacks, Microsoft Office 2021, 2021 WNBA playoffs, 2021 NBL pre-season, 2021 in paleomammalogy, 2021 Kabul airlift, 2021 in Palestine, 2021 Wisconsin elections, 2021–22 Scottish Cup, FIBA AfroBasket 2021, 2021–2023 Stagecoach strikes, 2021 Russian census, 2021 Islamic Solidarity Games, 2021–2022 United Kingdom censuses, 2021 NBL–Pilipinas Chairman's Cup, 2021 in UFC, 2021–22 AFC Wimbledon season, 2021 SAFF Championship, 2021–22 Gillingham F.C. season, 2021 European Baseball Championship, 2021 Uttarakhand flood, 2021–2025 Bulgarian political crisis, 2021 Polish speedway season, 2021 Alberta referendum, 2021 Super League season, 2021 Pakistan Super League, Wildfires in 2021, 2021 Empress's Cup final, 2021 in Professional Fighters League, 2021–22 Reading F.C. season, 2021 Russia–United States summit, Timeline of the Israeli–Palestinian conflict in 2021, 2021 BC Lions season, 2021 Australian census, 2021 in science, September 2021 Sudanese coup attempt, 2021 Pacific hurricane season, 2021 Tennessee Volunteers football team, 2021 Indian Premier League, 2021 SEC softball tournament, Tornadoes of 2021, 2021 SEA Games, International cricket in 2021–22, 2021 Andhra Pradesh panchayat elections, 2021 G20 Rome summit, 2021 Hormozgan earthquakes, 2021–22 Liga 2 (Indonesia), 2021–22 Stevenage F.C. season, 2021 Nagoya mayoral election, Produce Camp 2021, Planet Prince 2021, 2021–22 Valparaiso Beacons men's basketball team, 2021–22 Scottish Women's Premiership season, 2021 Nandigram Assembly election, 2021–22 Championnat Pro A, 2021–22 Doncaster Rovers F.C. season, PFL 10 (2021), 2021 (song), 2020–2021 Vendée Globe, 2021 Sukma–Bijapur attack, 2021–22 Ashes series, 2021 Africa Cup of Nations, 2021 Austin W Series round, 2021 Zavarovalnica Sava Portorož, 2021 New York state elections, 2021–22 Barnsley F.C. season, Vision 2021, International cricket in 2021, 2021 Città di Forlì II, 2021–22 Southampton F.C. season, 2021 CFL Premier Division, Mukhosh (2021 film), List of The Late Show with Stephen Colbert episodes (2021), 2021–22 Al Hilal SFC season, 2021–22 CCHA season, 2021 in the British Virgin Islands, 2021–22 Walsall F.C. season, 2021 Armenian political crisis, 2021–22 Middlesbrough F.C. season, 2021–22 NCHC season, 2021–22 Zamalek SC (handball), 2021 Dallas municipal election, PFL 7 (2021), 2021–22 Portsmouth F.C. season, 2021 Indian farmers' Republic Day protest, 2021 in France, 2021 cabinet reshuffle, 2021 Paradise Jam, 2021 in Eswatini, 2021 in Peru, January 2021 Baghdad bombings, 2021 Gent–Wevelgem, 2021 in England, E3 2021, 2021 Norwegian Football Cup, 2021 Lahore bombing, 2021 Porto Open, PFL 8 (2021), 2021 United States gubernatorial elections, 2021 W Series, 2021 in Qatar, 2021–22 Brentford F.C. season, King of the Ring (2021), Miss Vibhaa 2021, 2021 Four Nations Football Tournament, 2021 NFL season, 2021 Croatian census, 2021–22 Premier League, 2021 Classic Brugge–De Panne, 2021–2023 World Test Championship, 2021 Chechen general election, 2021 Extreme E Championship, 2021 South African unrest, List of spaceflight launches in July–December 2021, 2021 Wimbledon Championships, 2021 Bratislava Open, 2021 in Russia, 2021 Edmonton Elks season, PFL 9 (2021), 2021 BAL finals, 2021 MotoE World Cup, 2021 Super 20 Trophy, 2021 in Vietnam, 2021 in Canada, Associate international cricket in 2021–22, 2021 Italy wildfires, 2021–22 Tranmere Rovers F.C. season, 2021–22 Newport County A.F.C. season, 2021 Copa Libertadores, List of spaceflight launches in January–June 2021, 2021 WNBA Finals, 2021 Detroit Sports Car Classic, 2021–22 New Jersey Devils season, 2021 Paris–Nice, Battle of Kandahar (2021), Candidates Tournament 2020–2021, 2021 in the Gambia