New insights on why improvements to Chesapeake Bay remain a challenge

Source: Science Daily

A new look at the history of water quality in the Chesapeake Bay sheds light on how the estuary has responded to nutrient reduction efforts and why improvements have remained a major challenge. Environmental science researchers looked at the Bay’s historic response to efforts to reduce nutrients to minimize dead zones — areas with too little oxygen to support marine life — and found there is a pollution threshold after which it takes twice the effort to make a change.