Whales Still Threatened

Some larger whale species have been recovering since the dark days before the whaling industry was regulated, but the majority of cetaceans—that is, the distinct order of marine mammals consisting of whales, dolphins and porpoises—are in decline, with some likely headed for extinction in the near term.

Bike-riding and Traffic Pollution

The short answer is, yes, probably. Cars, trucks and buses emit considerable amounts of airborne pollution as they make their ways along city streets and highways. The fine particles, nitrogen dioxide and volatile organic compounds (VOCs) spewing out of tailpipes have been linked to a wide range of human health problems, from headaches to respiratory illness to cancer.