The map shows the winter oxidized nitrogen concentrations in the European coastal and open waters in 2008.
The low category refers to values within the lowest 20th percentile and the high category refers to values within the upper 20th percentile of concentrations in a regional sea
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To save on energy when cooking,
cut up your veggies into small pieces to reduce the cooking time. When boiling or steaming vegetables, boil the water in the kettle first – rather than on the hob, and use only as much water as is necessary.
More green tips