Regions have powers in fields that are connected with their region or territory in the widest meaning of the term.
So the Flemish Region, the Brussels-Capital Region and the Walloon Region have powers relating to the economy, employment, agriculture, water policy, housing, public works, energy, transport (except Belgian Railways), the environment, town and country planning, nature conservation, credit, foreign trade, supervision of the provinces, communes and intercommunal utility companies.
They also have powers relating to scientific research and international relations in those fields.