For decades visitors tossed coins and trash into Yellowstone’s Morning Glory Pool, and the debris clogged its vent and cooled the water — the spring named for its deep blue now runs green and orange, and rangers say the original color may never come back

A century of coins and trash transformed one of Yellowstone's most iconic hot springs from brilliant blue to murky green and orange—and scientists say the damage may be permanent. The post For decades visitors tossed coins and trash into Yellowstone’s Morning…