A lack of decent sanitation and clean drinking water are fertile ground for a cholera outbreak.
Progress in terms of water and sanitation has traditionally favoured those with money. But the hope with the SDG's is that this gap will be plugged in the future.
Current land-use patterns could see the value of 'ecosystem services' – the natural processes that sustain life – plummet by mid-century. But with the right policies we can turn this trend around.
Freshwater is one of the most threatened resources on Earth. Dragonflies can tell us what we need to know about the state of this precious resource.
There have been modest improvements in water and sanitation provision in Africa, but there is still a long way to go. Most citizens rate their governments’ performance in this sphere poorly.
Archaeological and textual detective work is filling in some information about how ancient Romans used and thought about their sewers thousands of years ago.