How can you shop in a more eco-friendly way?

From overbuying and unnecessary packaging to food waste, the way we shop can have a bigger environmental impact than we realise. In the UK, food and drink account for around a quarter of the average household's carbon footprint, according to the Carbon Trust.

UK households throw away around 6 million tonnes of edible food every year, according to estimates from the UK's leading waste reduction charity. But there is  good news; a few simple changes to the way you shop can make a real difference.

So, where should you start? Is food the only area where w...