Tag Archives: Hemmo Abels

Earth Heat, Salty Seas

The heat beneath: harvesting and recharging Earth subsurface heat, to heat and cool buildings, without heating Earth’s atmosphere. And, the wind blows, the sun shines … rivers flow. Wherever they flow into salty seas, power can be generated – just like that. A special GPM edition about geothermal, geoexchange and salinity gradient energy.


To Sleep, Perchance to Dream

Sleeping and dreaming — essential and mysterious. An old Tanzanian friend speaks about torrential rains and village celebrations. And, in the Dutch city of Delft, a big university digs deep for the heat beneath: geothermal energy.