Ashes can be used in road building among gravel. The use of ash from neighbouring heat plants reduces the use of natural aggregates. The use of ash in the road construction has been limited, as it is currently subject to environmental permits.
In the forest and energy industries, burning wood produces a lot of ash, which is placed in landfills. The forest industry alone generates more than 300 000 tonnes of exploitable ash every year. The increase in wood energy increases the amount of ash even further. Current measures to benefit from the use of ash do not correspond to the principles of sustainable consumption and production.
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