EurActiv: The European Commission is considering imposing an EU-wide tax on CO2 emissions on sectors such as transport and agriculture, which are currently not covered by the bloc’s cap-and-trade scheme for carbon dioxide, EurActiv has learnt. Background: Since the early 1990s, there have been several attempts to introduce a unitary carbon tax across all EU member states. But an EU carbon tax has never materialised, as countries like the UK were unwilling to render national …