Regular contributor, John Redwood MP gives us a brief overview as to what 'Zero Carbon in 2030' would actually look like.

Labour and Green campaigners say the UK needs to get to zero net carbon dioxide output by 2030. The government says this will take another twenty years to 2050. What do you think about the idea? What would be required to get to zero by 2030?

Let's start with surface transport. Does it entail phasing out all diesel and petrol cars within ten years? How many of us are prepared to give up a car altogether? Is it feasible to assume a complete fleet of electric cars by 2030 all running on power from renewables? How many people will switch to bikes and walking for how many journeys?

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What actions need to be taken to curb air transport? Experts and governments wanting to get to zero carbon dioxide emissions all say there has to be a big reduction in jet travel. How high would tax need to go on airfares? What alternatives to current planes burning oil based fuels are there? How feasible are sailing boats as an alternative? What are the implications for holidays and foreign travel?

What should be done about shipping? The UK is dependent on a lot of traditionally powered ships for a wide range of imports from all round the world.l Will action be taken by tax, or regulation or both?

What would a 2030 carbon free home look like? How easy will it be to retrofit all existing older homes? What will it require in terms of insulation, new heating systems, water husbandry and controls? Will government subsidise this work, or will it require householders to carry it out at their own expense?