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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!

Listen

Plastic carrier bags

End of Section

Vocabulary

campaign

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

resource

here, a valuable and useful product

criticism

the expression of disapproval of someone or something

biodegradable

something that decomposes or breaks down naturally without any special treatment

compulsory

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

behaviour

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

ethos

set of ideas and attitudes

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