Efforts are being made to improve the health of
a. chesapeake bay
b. long island sound
c. puget sound
d. all of the above

Correct

d. All of the above

Chesapeake Bay is an estuary in the U.S. states of Maryland and Virginia. Efforts have been made in Chesapeake Bay to improve water quality, the Bay improved slightly in 2010, after an investment of about $ 15 million in cleanup. Long Island Sound also suffers from pollution and has had strategies to reduce the amount of nitrogen that enters, such as the state of New York and Connecticut.

Finally Puget Sound has received collaboration from different sectors using science and research thanks to the Department Ecology State of Washington.