Ashley Cooper / Bus in Delhi, India, December 2012. All of Delhi's buses run on Compressed Natural Gas (CNG), it is the worlds largest eco friendly bus fleet, and has helped to improve Delhi's air quality.

Nick Upton / ITER Bioclimatic village, with a variety of eco-friendly houses built from recycled materials and using solar and wind energy, near El Medano, Tenerife, May.

Flip Nicklin / Gray Whale (Eschrichtius robustus) curious calf spyhopping near whale watching boat, Magdalena Bay, Baja California, Mexico

Pat Tuson / The Small Green Bag, reusable shopping bag from Tesco held by woman in queue at plant sale, London UK

Pat Tuson / Man in street carrying The Big Green Bag, reusuable bag from Tesco, London, UK

Pat Tuson / Shopping in reusable cotton bag in wire backet on bicycle, London, UK

Pat Tuson / Sainsburys Little Green Van, an electric powered delivery vehicle, Marylebone London, UK

Pat Tuson / The big green bag, Tesco reusable shopping bag held by man, Islington Farmers Market, London, UK

Pat Tuson / Reusable cotton bag with plastic bottles for use as garden cloches within, London UK

Pat Tuson / Reusable cotton Bag used to carry shopping, London UK

Pat Tuson / Close up of a recharger plug for electric car, London UK

Pat Tuson / Plantlock Secure Bike Storage with bikes outside house in snow, Highbury, London Borough of Islington, UK