Don’t be sniffy about sewage – or concrete

This month’s feature articles look at two topics that arguably don’t get the love or attention they deserve when you consider their importance in today’s world: sewage treatment and concrete. Both are pretty much indispensable to our lives, and both are in great demand in less-developed countries. It’s easy to be sniffy about sewage if you just flush and forget, but 60% of the world’s population – 4.5 billion people – live without access to proper toilets, and that’s a huge public health problem.