The Carbon Diaries 2015 by Saci Lloyd

Just realised that I've missed out two books I've read recently. The Carbon Diaries are set in the not too distant future when climate change has become even more problematic and the Government has decided to take drastic steps. Everyone has a carbon card - you can only use so much carbon per month, and if you use up your ration, well, no more transport, hot water or electricity for you until the end of the year. Of course, there is a black market, and the stress of loving more simply causes a lot of friction within the family, but eventually the community pulls together - but what will happen when London is flooded?