For the third year running toxic blue-green algae blooms that look like pea soup and smell like rotten eggs have covered much of Lough Neagh, the largest lake in the UK and Ireland.

But this summer, the thick green veneer -- so widespread it is visible from space -- has been worse than ever, according to locals living near the Northern Ireland landmark. 

Originally published on doc.afp.com, part of the BLOX Digital Content Exchange.