PANAMA CITY, Panama, Dec. 7 -- The Smithsonian Tropical Research Institute issued the following statement on Dec. 6, 2023: * * * Joshua Tewksbury, director of the Smithsonian Tropical Research Institute, explains how the development of a global standard measure of forest carbon will jumpstart the carbon economy. Where I get groceries, a lot of food is sold by weight. There are choices to make--should I buy the expensive apples or the cheaper ones--but I trust the scales at the checkout counte  more