Energy is already taxed in the EU but agriculture has an exemption. The aim of the possible new ‘green’ taxation is to expand action against climate change to include the transport, construction and agriculture sectors, which account for 60% of the 2.2 billion tonnes of CO 2 and other greenhouse gases emitted annually by the European Union, explains the Commission.
http://www.europolitics.info/economy-monetary-affairs/commission-explores-carbon-tax-art273634-30.html