I assume that the Deputy is referring to revenue raising fiscal measures which are designed to reduce the emissions of greenhouses gases such as carbon dioxide, and whose chargeable basis or rates are set with reference to greenhouse gas emissions.
The carbon tax, which applies to fossil fuels at a rate of €20 per tonne of carbon dioxide emitted, raised €385.4 million in 2014.
Vehicle Registration Tax (VRT) is applied to vehicles on their first registration in the State. Since 1st July 2008 VRT on passengers cars has been determined on the basis of the carbon dioxide emissions of the car. VRT raised €542.1 million 2014.
In addition, the rate of motor tax on passenger cars is determined on the basis of the carbon dioxide emissions of the car in respect of new cars registered from 1 July 2008. As the Deputy is aware, motor tax is a matter for my colleague, the Minister for the Environment, Community and Local Government, with the revenues raised going towards the Local Government Fund.