Transport for London hopes £1.50 price hike will deter all but the most essential trips, as Mayor resists calls for small business discounts
MSPs overwhelmingly approve new law, paving the way for levy to come into force in October
Government-backed figures reveal emissions rose in 2013 for the first time since 2007
Government due to unveil final details of new policy next month, targeting billions of pounds in energy savings
New US research reveals carbon impact of video streaming to be much lower than buying or renting DVDs
New survey by International Emissions Trading Association calls on EU to set ambitious 2030 carbon cutting target
Sources reveal Commission is considering energy efficiency target as officials prepare new energy security strategy
Brussels insiders remain optimistic the EU can still pass ambitious 2030 carbon targets, despite a rising tide of scepticism
New consultation proposes "cap and floor" financial support mechanism for new international links that could curb costs and emissions
David Kennedy to take on new role at DfID, after seven years at government's climate change advisor