tesco

Update, 9 March 2011: both Princes and Asda have committed to removing tuna caught using fish aggregating devices in combination with purse seine nets from their supply chains by 2014. Read more >>

Having got wind of our new tinned tuna league table (see below) and the fact that it was going to come last, Tesco has done a spectacular u-turn. After being the subject of a Greenpeace investigation, it has radically improved its policy on the fishing methods it will permit for its own-brand tuna.

Like orang-utans, the future of Sumatran tigers is being jeopordised by the relentless destruction of their habitat by paper giant APP

Even though we've had huge success in turning companies like Unilever, Nestlé and Kraft off palm oil produced by Sinar Mas, that only represents one part of the jigsaw and Sinar Mas is still chewing its way through Indonesia's rainforests.

Palm oil is one of two plantation products which are driving deforestation in Indonesia, paper being the other big hitter. Needless to say, Sinar Mas is up to its neck in the paper business as well and we've compiled new evidence in a report called Pulping the Planet which shows exactly how its pulp and paper operations are threatening the forests just as much as its palm oil business is.

This female Caribbean Reef Shark in Roatan apparently survived a finning - most do not © CC yukikokubo

Tesco have just announced that they're going to stop selling shark fins in their stores in Thailand.

This follows some bad press on the issue and subsequent lobbying by the Shark Trust to clean up their act.

Sharks are a dividing issue with people – some people love them and are fascinated by them, others are terrified of them. Whilst sharks have an ferocious and fearsome reputation, and any shark attack or alleged sightings of man-eating great whites off Cornwall make the news, we rarely hear of the impact we humans are having on sharks. And we are having an enormous impact.

Something of a debate has developed on the venerable Today programme about light bulbs. It kicked off when Tesco boss Sir Terry Leahy appeared yesterday plugging a £25 million investment in a sustainable consumption institute.

Something that happened a few weeks ago but has slipped through the net is that Sainsbury's has announced an improved policy on light bulbs. By committing to phasing out those wasteful incandescent bulbs by 2010, they join Asda and Morrisons (who also recently shifted their stance) further up our league table. That still only gives them a D, but it leaves three supermarkets lower down - Tesco and the Co-op at E and Somerfield a disappointing F.

Meanwhile, there's been no further word from wooden spoon winners Woolworths since their CEO's response to our day of action, but we're still working on them. You may have been invited to sign a 'Seize the Light' flag outside you local branch, as groups of Greenpeace volunteers (like the Blackburn group pictured) have been collecting signatures to show Woolworths that their customers want them to help everyone improve their energy efficiency by getting rid of out-dated, inefficient light bulbs.

If you haven't emailed Woolworth CEO Trevor Bish-Jones, now's the time - everyone who's done so has received a personal response, and you could be one of those lucky people. Or if you fancy a bit of flag-signing, contact your local Greenpeace volunteer group and find out how you can help everyone make the switch.