Germany This article is more than 5 months oldGerman supermarket trials charging true climate cost of foodsThis article is more than 5 months oldPenny chain raises price of products including wiener sausage, cheese and yoghurt in week-long experiment A leading discount supermarket in Germany has raised the prices of a selection of its products to reflect their real cost on people’s health and the environment. In a week-long experiment in all 2,150 branches of the Penny chain, a range of nine products, mainly dairy and meat, will be priced at what experts from two universities have deemed to be their true cost, in relation to their effect on soil, climate, water use and health.

In the pink: the perfect rhubarb and custard tart. Photograph: Robert Billington/The GuardianView image in fullscreenIn the pink: the perfect rhubarb and custard tart. Photograph: Robert Billington/The GuardianHow to cook the perfect ...DessertThese two foodstuffs go hand in hand, and this tart is an excellent choice for Easter. If you still get hold of some bright pink forced rhubarb, even better Rhubarb and custard go together like cheese and pickle, orFanny and Johnnie: whether it’s served up insteaming, stodgy spoonfuls in the school dinner hall orelegant tartlets in the royal kitchens, it’s a classic double act.

Carol Rumens's poem of the weekPoetryPoem of the week: The Opposite of Confidential by Claudine ToutoungiA chorus of birds takes on the leading role in a poem exploring creativity and freedom of expression The Opposite of Confidential Nobody questions the birds. Their trills are never subject to inspection or forced to satisfy requirements. Light-boned libertarians (the opposite of confidential), they cannot keep it in. You will not see them lining up in rows,

Country diaryTrees and forestsWenlock Edge, Shropshire: Winged seeds come spiralling out of the murk to land in the lane From the corner of my eye I see something move but don’t catch what it is. Then there’s another movement, a dark spinning. I watch sycamore keys come spiralling out of the murk to land in the lane. There’s an Egyptian creation myth about sycamore. The goddess Hathor, the Holy Cow, sat in a sycamore at sunset and created the earth, everything living on it, and the sun.

The best climate strike signs from around the globe – in pictures Share on Facebook Share on Twitter Share via Email Millions of people across the globe took part in protests on Friday demanding urgent action on the climate crisis. The strike kicks off a week of environmental activism before the UN climate action summit Main image: A protester attends a demonstration Friday in Washington DC.