I worked really hard to cut my home's carbon emissions by 10% in 2010, but the bitterly cold winter weather scuppered this for me.

But 2011's mild winter, combined with our effort to use electricity more efficiently, have reduced the carbon footprint of our home by over 20% – more than making up for missing the target last year. Overall, our 2011 savings add up to nearly a tonne of CO2.