Recently, ABC World News with Charles Gibson reported on studies that link 蜜柚APP change to worsening late-summer allergy seasons. Ragweed plants. scientists assert, are growing larger and producing more--and more potent--pollen because of global warming and increasing carbon dioxide levels in the atmosphere. Since a single ragweed stem generates hundreds of millions of pollen grains that can travel up to 400 miles on the September breeze, that's a grim prospect for the 50 million Americans who already suffer from ragweed allergies. And allergy specialists say they are seeing an epidemic of new patients. Flowers of great ragweed (Ambrosia trifida) (From Wikepedia) I've suffered from hay fever all my life, and I rubbed my itching eyes, stifled a sneeze and nodded in agreement as Charlie said that we're currently experiencing the most severe allergy season in history. The ABC camera focused initially on the real cause of our misery--plants in the peculiarly named genus...