Sap transport proteins. Recent evidence indicates that mobile proteins and RNA are part of the plant's long-distance communication signaling system. Evidence also exists for the directed transport and sorting of macromolecules as they pass through plasmodesmata." A large number of insects of the order Hemiptera (the half-wings), feed directly on phloem sap, and make it the primary component of their diet. Phloem sap is "nutrient-rich compared with many other plant products and generally lacking in toxins and feeding deterrents, [yet] it is consumed as the dominant or sole diet by a very restricted range of animals". This apparent paradox is explained
Sugary drink tax a sugary drink tax alone. In March 2017, Pepsi laid off between 80 and 100 employees at two distribution plants in Philadelphia and one plant in nearby Wilmington, Delaware. The company blamed the layoffs on the tax, an assertion rejected by the city government. In September 2016, the American Beverage Association, Philadelphia business owners, and other plaintiffs filed a lawsuit against the soda tax, alleging that the tax violated the "Tax Uniformity Clause" of the state constitution. The legal challenge was dismissed by the Court of Common Pleas in December 2016, and in June 2017 the Commonwealth Court of Pennsylvania