EU Energy Union – Denmark’s National Energy and Climate Plan (NECP) Read Denmark's National Energy and Climate Plan (NECP) for the period 2020-2030. Danish climate policies The Danish policies on climate change mitigation is driven partly by compliance with international climate obligations, and partly by achieving national targets in the energy sector. Greenhouse gasses Greenhouse gasses occur naturally in the atmosphere and have the particular property that they let radiation from the sun through the atmosphere to heat the earth’s surface, and block part of the outgoing heat from leaving the atmosphere. International energy policy Denmark in the international energy policy. Green Growth in Denmark On green growth in Denmark.