If hurricanes form over the ocean from salty waters, why do they drop fresh water when they come ashore and travel inland?
—Glen Moyer, Hampton, Va. The various salts in the ocean are physically dissolved in the water, but they are not chemically bonded to it. So when the water evaporates, these salts stay behind. The same goes for other impurities, which are plentiful, especially near coastlines. It’s nice to know we don’t also get showered by everything from tiny bits of seaweed to animal waste. (Ocean swimmers: Try not to think about this!) Hurricane winds do bring some ocean matter onshore, but that’s a different subject. Send questions to