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Insight for Sunday 3 January 2010

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TrustPower sells carbon credits from its Tararua Windfarm to a number of businessesA growing number of companies are branding themselves as carbon-neutral.

There are also schemes in to which consumers can pay money to off-set their own carbon foot-print.

But do the schemes stack up? Ian Telfer investigates.

First broadcast on 26 July

Photo:TrustPower sells carbon credits from its Tararua Windfarm to a number of businesses