A butterfly flapping its wings in the South American rainforest will cause a hurricane in Texas two weeks later, this is the inference of meteorologists. However, an armed conflict in Sudan, an African country, may lead to the outage of carbonated beverages such as cola. Such a “butterfly effect” is really happening in the current world. 　　A recent Reuters article pointed out that currently 70% of the world’s gum arabic comes from Sudan. Affected by the continuing armed conflict in the country, Coca-Cola and other major soft drink manufacturers will not be able to purchase it in the short term—and it happens to be indispensable in the production of soft…