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 Sugary drink tax A sugary drink tax or soda tax is a tax or surcharge designed to reduce consumption of drinks with added sugar. Drinks covered under a soda tax often include carbonated soft drinks, sports drinks and energy drinks. The tax is a matter of public debate in many countries and beverage producers like Coca-Cola often oppose it. Advocates such as national medical associations and the World Health Organization promote the tax as an example of Pigovian taxation, aimed to discourage unhealthy diets and offset the growing economic costs of obesity. Type II diabetes is a growing health concern