As the first sun hits, many British patios reveal green stains, rust rings and tired slabs. One low-tech mix of two cupboard ...

This release is available in German. In Germany, ambient air quality is not always as good as it might be – data from the federal environment ministry makes this all too clear. In 2009, the amounts of ...

After a long, wet winter, my patio was looking a tad worse for wear. The slabs had been dulled by months of grime, and dark patches of algae had crept in, and the whole area just felt pretty tired and ...