Whether it’s found in a cup of hot joe, a chunk of chocolate, or an energy drink, caffeine is one of our favorite tipples — but alas, all the mild psychostimulant contained in those daily “pick me ups” has to go somewhere. A just published global study of pharmaceutical pollution sampled 1,052 sites in 258 rivers — covering 104 countries across multiple continents. Researchers found that freshwater caffeine pollution is rife the world over: It was among the ingredients with the highest concentrations in river surface water and detected in more than 50% of sampling sites. This revelation comes …