there s a hidden danger. not so hidden. it s before our eyes. we saw it in sao paulo. it s the pollution being emit sfemited from the fires. just a week ago, to what it is now. this is a compel ilin inling im nasa. this drifts for about a month. and upper-level winds can drive that into sao paulo. that is what we saw took place. this puts it into the forefront of the media, as the pollution from the smoke and the fires in the ramazon, blanketed that are.