Sainsbury's

Supermarket hopes to save 140 tonnes of carbon emissions a year by reducing diameter of toilet roll tube

Start-up aims to have more than 40 anaerobic digestion plants generating 100MW of electricity across the UK in five years' time

Retailer estimates UK could save two million tonnes of greenhouse emissions if all supermarkets switched to CO2

Telling customers that food can be frozen any time up to the 'use by' date could save 800,000 tonnes of food waste

Sainsbury's chief and audience members take energy secretary to task for putting jobs and investment at risk

Retailer unveils 20 green targets to be achieved by the end of the decade

Sainsbury's and Unilever endorse report calling on firms to lead development of greener consumer goods

Waitrose and Birdseye also record a big increase in sales of sustainable fish

'Switch the Fish' campaign will offer free alternative to most threatened species in a bid to influence customer choices

Supermarket chief executive Justin King warns mandatory carbon reporting would create arbitrary regulations which would fail to drive real change