Sand Innovation -Climate Change mitigation – Outdoor Sand containers – Take advantage of Sand. Build many 100000 sand containers. For rainwater retention. Provides ?humidity for insects. Sand heat pumps could also work for cooling or heating I dont know which But its good? // Per

Sand Innovation -Climate Change mitigation – Outdoor Sand containers – Take advantage of Sand. Build many 100000 sand containers. For rainwater retention. Provides ?humidity for insects. Sand heat pumps could also work for cooling or heating I dont know which But its good? // Per