they dredged the public fishery during oyster season, and harvest oysters from their aquaculture beds the rest of the year. >> for the past 3 years we've been putting around 50 millioion baby oysters on our leases. and each one of those oysters has the potential of filtering 50 gallons of water a day, and once when you start doing the math, you start entering into the trillions of gallons of water that get filtered just by your little operation. >> starting a lease is extremely challengingng because you a are tasked with taking bare end bottom and improving it to the point where you can harvest oysters. >> eric wisner had to add 4 inches of substrate before he planted spat on shell in his oyster farm. his investment seems to be payiying off. he saw some markrket sized oysts in about 18 months. another challenge to restoration for both sanctuaries and aquaculture is shell. at one time there were hundreds of shucking houses in maryland, but today, there are only a handful, and only one year round operation, harris seafood on kent island. >> up until the last 3 years, we sold all ourr sh

rhode island's clammers, lobstermen and aquaculture growers are watching with real alarm the damage acidified seas are doing. on america's northwest coast, oyster hatcheries have already experienced significant losses when their new hatches were unable to grow their shells in the acidified seawater. off the coast of washington, oregon and northern california, 50% of ocean pteropods were measured to have -- quote -- severe shell damage, mostly from acidified seas. if that species collapses, the bottom falls out of the oceanic food chain there. as the oceans go, mr. president, so goes the planet. it is my sincere hope that president-elect trump will feel the call of history, of reason and of patriotism to live up to the awesome responsibilities he now will bear. the 22nd session of the conference of the parties to the u.n. framework on convention of climate change, so-called cop-22 is now taking place in morocco. a similar gathering took place in copenhagen seven years ago. a full-page ad in "the new york times" then called for passage of climate legislation in the u.s., for investment in the clean energy economy, and for leadership to inspire th