https://citizenchallenge.com/2026-10-251.0 https://citizenchallenge.com/rules2026-10-250.4 https://citizenchallenge.com/facts2026-10-250.8 https://citizenchallenge.com/partner2026-10-250.3 https://citizenchallenge.com/c/7-day-citizen-science-log2026-10-250.6 https://citizenchallenge.com/c/tidy-your-street2026-10-250.6 https://citizenchallenge.com/c/read-a-local-meeting-agenda2026-10-250.6