POLLUTION
POLLUTED OCEANS
An additional problem is pollution of the world's seas and oceans. Litter dumping (particularly plastic), sewage and crude oil leaks and spills from ever-larger tankers are major problems. Polychlorinated biphenyls (PCBs), dioxins and mercury- amongst the most poisonous chemicals to humans-are found in increasing quantities among fish populations. Scientists researching sea life along the UK coast have discovered lots of evidence of the effects of chemical pollution on fish, including, in one case, female eggs growing inside male bodies. |