Instead of heating by gas, warmth power linking is getting in. In this system the heating takes place when most needed. Other techniques though also increase in usage, such as geothermical heating. Geothermical heating is one of the most sustainable forms of energy, but needs costly investments and isn’t always at hand. There is a future for this kind of energy though and not only for greenhouses, but also for housing cooperations and industry.
There are also farmers that use biogas-installations. From manure and organic rest material gas is derived. With this gas asparagus and strawberry greenhouses are heated. Besides this there is a coproduct, called ‘digestat’. This is a nutritive kind of manure for potatoes and some other vegetables. Thirdly, the installations deliver electricity for households. This economizes earth gas and reduces the quantity of CO2-emision.
The strawberry tastes as well as ever, but the lable ‘sustainable’ works well, as ever more clients attach value to ecology.