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Last updated at 11:14 BST, Thursday, 13 October 2011

Plastic carrier bags

A pigeon

Rob and Cath discuss plans to discourage people from using and wasting plastic carrier bags and to think more about the environment.

This week's question: Approximately how many plastic carrier bags are used worldwide every year? Is it:

a) 500 million

b) 500 billion

c) 500 trillion

Listen out for the answer at the end of the programme!


Plastic carrier bags

End of Section



a set of activities planned to achieve something, such as social or political change


here, a valuable and useful product


the expression of disapproval of someone or something


something that decomposes or breaks down naturally without any special treatment


something that must be done

financial levy

a sum of money that you pay in tax

landfill sites

a place where a large amounts of waste materials are disposed of

to wean

to gradually make people stop doing something or using something


the way people or things act, function or change

environmentally friendly

a caring effect on the natural world, such as plants, animals and the atmosphere


set of ideas and attitudes



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