Long Island Sound’s toxic ‘dead zones’ hit historic low — which could mean a surge in wildlife

The Long Island Sound has reached its lowest levels of toxic, inhospitable 'dead zones' in nearly four decades, potentially marking a surge in wildlife such as dolphins and whales. The decrease in hypoxia, or significant lack of oxygen, from roughly 430 square miles to just 18 square miles, is attributed to improved wastewater treatment and advocacy efforts. This improvement has already led to sightings of dolphins in the area, a sight that was rare in the past due to the inhospitable conditions.