Day 8: Blue – Citizenship of People Who Have Traveled to Space 30 Day Map Challenge 2021Christian PrzybylekDecember 9, 2021#30DayMapChallenge2021, SpaceComment
Day 7: Green - Tree Canopy in the United States of America 30 Day Map Challenge 2021Christian PrzybylekDecember 8, 2021Trees, Forestry, #30DayMapChallenge2021Comment
Day 6: Red Number of Nuclear Warheads by County 30 Day Map Challenge 2021Christian PrzybylekDecember 7, 2021#30DayMapChallenge2021, Nukes, AnthropoceneComment
