The greenhouses in Maasland are heated carbon-free. In the southern corner of the complex is a geothermal well, pumping up 90C hot water from underground. "With every kilometre down you get around 30C of heat warmer," says Danny van den Berg, policy advisor at Geothermie Nederland. At 3km deep, this one has enough heat up for all the greenhouses for 7km around.

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สาระสำคัญ  bilberry