11.   Other wells continued to burn, causing atmospheric pollution on an epic scale.

12.   Oil leaking from the Cypriot-registered Haven tanker, which exploded during a routine pumping operation off Genoa, caused pollution along the Mediterranean coast eastwards towards Nice.

13.   The pollution had been caused by agriculture and industry, both illegally and legally.

14.   The company itself admits that the activity will cause residual pollution and will drive away from the area large animals such as chimpanzees, leopards and pygmy hippopotamuses.

15.   Water pollution is also caused by the wide variety of pesticides and other agrochemicals, the NRA says.

16.   The new vehicles, a Swedish make, are considerably less polluting than older double-decker buses, which in many cases caused pollution well above European Community standards.

17.   Environmentalists warn however that the generation of electricity required to produce the hydrogen will still cause pollution.

18.   Hospital incinerators in Britain are causing serious pollution as a result of economizing on fuel and overloading with waste material.

19.   This not only causes chaos, but is also a waste of water and causes pollution.

20.   We cannot see the official tests showing which cars cause least pollution or have the best safety features.