The greenhouse horticulture sector and government have agreed on a target of 4.6 megatonnes in 2020. In 2017, CO2 emissions increased to 5.9 megatonnes, which means that the greenhouse horticulture sector is above the goal. CO2 emissions fell considerably in the 2010-2014 period, primarily due to a reduction in acreage, reduced electricity sales and lower energy consumption per m2 of greenhouse. There was a slight increase between 2014 and 2017, but after correction for temperature, CO2 emissions were broadly stable. Influencing factors in this period were a reduction in acreage, more sustainable energy, increased electricity sales and an increase in energy consumption per m2. For energy consumption per m2, a strengthening of demand for electricity from lighting and for heat was an influencing factor in the 2014-2017 period. In 2017, the proportion of sustainable energy in the total energy consumption increased to 6.5% thanks to the purchasing of sustainable electricity and geothermal heat. Energy efficiency remained the same in 2017.
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