How massive holes in Berlin help fight water shortages

Germany's capital has a problem with rising temperatures and drought. So the city has come up with solutions for how to collect and store rainwater, turning Berlin into a sponge city.

source https://www.dw.com/en/how-massive-holes-in-berlin-help-fight-water-shortages/a-69864142?maca=en-rss-en-ger-1023-rdf