'Biodegradeable' plastic balloons are killing wildlife, campaigners warn

Plastic advertising balloons that blow away to sea are killing seabirds, seals and other wildlife, campaigners have warned."Dolphins, whales, turtles, seabirds and other animals have been killed by balloons," a Marine Conservation Society spokesman told Sky News.A dead seal with a balloon and ribbon hanging from its mouth was recently found on a Cornish beach by wildlife campaigner Claire Wallerstein.