The plans are certainly a long way from law at this point, however. The proposal is set to be voted on by Lib Dems at an upcoming party conference in Glasgow. If adopted, the plan would become part of the party's own policy, but not the law of the land.
Other items up for debate, and pursuant to the zero-carbon goals, include: an air passenger duty with trip-based carbon consumption charges, road-use tolls in congested areas and expansion of nuclear power and shale gas exploration.
According to the report in The Telegraph, Lib Dems are interested in the cost-saving potential of shale exploration, as long as "regulations controlling pollution and protecting local environmental quality are strictly enforced, planning decisions remain with local authorities and local communities are fully consulted over extraction and fully compensated for all damage to the local landscape."