Farmers took to the streets in Brussels on Monday, demanding a law banning the sale of dairy products at a price below production costs. Demonstrators, with fake cows painted in the colours of the European flag, marched between the headquarters of the European Parliament and the Commission in the Belgian capital. Kjartan Poulsen, president of the European Milk Board, told Euronews that protesters wanted an EU-wide version of a Spanish law on “unfair commercial practices”, which forbids selling “products below cost at all stages of the purchasing chain.” He said production costs vary from count…