Would you like a receipt? cefixime 200 mg chewable "It's an ongoing concern - for the melting of the glaciers in the Himalayas, for reduced duration of the snowpack in the Sierra Nevada and Rocky Mountains and the impact that has on water supplies, as well as the more rapid melting of ice in the Arctic and in Greenland," VanCuren said. "We've accepted the idea that humans have been modifying the atmosphere in terms of carbon dioxide, but the effect of soot has not been very well dealt with in terms of its long-term effect."