The famous canals of Venice have been looking clearer since Italy went on lockdown to slow the coronavirus pandemic. "The water now looks clearer because there is less traffic on the canals, allowing the sediment to stay at the bottom," a spokesman said. "It's because there is less boat traffic that usually brings sediment to the top of the water's surface." While water pollution may not have decreased, air quality has improved, according to the spokesman. "The air, however, is less polluted since there are less vaporetti and boat traffic than usual because of the restricted movement of residents," he said. And the result? Invasion of the dolphins. Source