| URL | Priority | Change frequency | Last modified (GMT) |
|---|---|---|---|
| https://22nd-century.jp/environment-issues/geothermal-power-generation-rankling/ | 20% | Monthly | 2021-11-06 07:50 |
| https://22nd-century.jp/environment-issues/china-korea-air-pollution/ | 20% | Monthly | 2019-07-27 05:33 |
| https://22nd-century.jp/environment-issues/air-pollution-ranking/ | 20% | Monthly | 2021-09-04 06:50 |
| https://22nd-century.jp/environment-issues/solar-power-ranking-top10/ | 20% | Monthly | 2022-03-06 15:48 |
| https://22nd-century.jp/environment-issues/co2-emissions-world-ranking/ | 20% | Monthly | 2021-09-25 05:12 |
| https://22nd-century.jp/environment-issues/hydropower-percentage-world-ranking/ | 20% | Monthly | 2021-10-25 09:44 |