The threats to flora and fauna are increasingly diverse and complex. A quarter (24%) of freshwater wildlife, including crustaceans, fish and insects, face a ""high risk of extinction'' due to ""considerable pressures'' such as pollution, dams or intensive farming that are affecting their habitat, a study published in the scientific journal Nature concluded. Freshwater, including rivers, lakes and wetlands, is home to more than 10% of known species, including about a third of vertebrates and