Words_Are_Hrad t1_j5t5aqa wrote on January 25, 2023 at 11:33 AM

Reply to comment by [deleted] in The Key to California’s Survival Is Hidden Underground The state is ping-ponging between severe drought and catastrophic flooding. The solution to both? Making the landscape spongier. by Sariel007

>250k people or dams 1500 years ago

China's population during the warring states period ~2500 years ago was ~40 million. And the oldest dams in the world date back ~5000 years ago. Hard to imagine China not having dams 1500 years ago.