Whаt dоes the wоrd ‘prоliferаtes’ best meаn in the context of Paragraph 1? 1. Spring brings fresh blooms and warmer weather, but those seasonal changes also herald the start of allergy season for about 40 million Americans. As pollen proliferates, so too does the sneezing, itching, and nose blowing that comes with hay fever. If it feels like your allergies keep getting worse with each trip around the sun, that might really be the case. And there's a major culprit to blame: climate change