Proceedings of the National Academy of Sciences, Volume 122, Issue 24, June 2025. SignificanceWalking and cycling emit virtually no pollution and help people integrate physical activity into their daily lives. We demonstrate the untapped potential of street redesigns and urban densification to increase walking and cycling, with …
Observations from the Little Bunker
Last updated: August 18, 2025 04:13 PM
Atmospheric CO₂
425.4 ppm
+18.4
ppm/year
Atmospheric CH₄
1934.91 ppb
+9.11
ppb/year
Global Temperature
+1.48 °C
Peak: +1.73°C
World Population
8.1 billion
+67
million/year