asked Her Majesty's Government:

Further to the Written Answer by Lord Davies of Oldham on 20 October (WA 79), whether those involved in the spending review would be in possession of data showing how much revenue has been raised by taxes on the generation of methane and of nitrous oxide; and, if so, how up-to-date such figures would be. [HL5922]

There are no taxes on the generation of methane or nitrous oxides and therefore there are no data about the revenues.