Again, from TFA, the install needs 5 hectares of flat land. I thought it was odd...

		Hnrobert42 11 hours ago \| parent \| context \| favorite \| on: CO2 batteries that store grid energy take off glob... Again, from TFA, the install needs 5 hectares of flat land. I thought it was odd when the article mentioned "flat" land, but I assumed it was more about accommodating the bubble. Now I am thinking it is specifically to avoid the valleys you are describing.