| 1 | A | B | C |
| --- | --- | --- | --- |
| 2 | World Congress of Soil Science |  |  |
| 3 | WCSS | Year | Location |
| 4 | 23rd | 2026 | Nanjing, China |
| 5 | 22nd | 2022 | Glasgow, Scotland, United Kingdom |
| 6 | 21st | 2018 | Rio de Janeiro, Brazil |
| 7 | 20th | 2014 | Jeju-do Island, South Korea |
| 8 | 19th | 2010 | Brisbane, Queensland, Australia |
| 9 | 18th | 2006 | Philadelphia, Pennsylvania, U.S. |
| 10 | 17th | 2002 | Bangkok, Thailand |
| 11 | 16th | 1998 | Montpellier, France |
| 12 | 15th | 1994 | Acapulco, Mexico |
| 13 | 14th | 1990 | Kyoto, Japan |
| 14 | 13th | 1986 | Hamburg, Germany |
| 15 | 12th | 1982 | New Delhi, India |
| 16 | 11th | 1978 | Alberta, Canada |
| 17 | 10th | 1974 | Moscow, Russia |
| 18 | 9th | 1968 | Adelaide, Australia |
| 19 | 8th | 1964 | Bucharest, Romania |
| 20 | 7th | 1960 | Madison, U.S. |
| 21 | 6th | 1956 | Paris, France |
| 22 | 5th | 1954 | Leopoldville, Democratic Republic of the Congo |
| 23 | 4th | 1950 | Amsterdam, Netherlands |
| 24 | 3rd | 1935 | Oxford, England |
| 25 | 2nd | 1930 | Leningrad, Russia |
| 26 | 1st | 1927 | Washington DC, U.S. |

Question: When and where were the 20th and 21st WCSS held?
Answer: The 20th WCSS was held in 2014 on Jeju-do Island, South Korea and the 21st WCSS was held in Rio de Janeiro (Brazil) in 2018.