In many Mexican cities, water is treated as a political bargaining chip – a favor that public officials can trade for votes, bribes or power.
We need to delve into the mucky complexities of fats, oils and greases in and beyond the home.
Modern sewerage infrastructure, exported from Britain to the globe, is entirely dependent on water. In a world of growing climate extremes, it's time to look beyond this colonial legacy.
It's a dirty scientific job – but it could save lives.