Five carbon lives

THE MADDEN FAMILY, FROM THE USA

"I think everyone needs to do their bit - but in America we use an awful lot" - Valerie Madden.

Matthew Price went to Boston, Massachusetts, to meet the Madden family. Ben is a computer engineer, his wife, Valerie, is a hospital admin assistant. They have two children, Henry, three and Sophia, nine.

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THE CAPP FAMILY, FROM THE UK

"I do go around, constantly telling the children - 'please switch that off'!" - Alison Capp.

The Capp family live in Minster, Kent.

Dad Paul is a teacher and mum Alison works for a foster care agency.

Nick Higham met them - and their children Jennifer, nine, Oliver, 11 and Hannah, 18.

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THE SAAD FAMILY, FROM THE UNITED ARAB EMIRATES

"I'm scared about the future... but to be honest I don't change my lifestyle" - Mohsen Saad.

"I do worry about the petrol bills - but it's cheaper in this country than anywhere else" - Rania Saad.

Roger Harrabin went to the United Arab Emirates to meet Rania and Mohsen Saad. The couple are both academics and have a young daughter, Clara.

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THE KAMRA FAMILY, FROM INDIA

"There is no way of comparing India to America" - Pawan Kamra.

Sanjoy Majumder visited Pawan and Sangeeta Kamra at their home in south Delhi.

Pawan is an office manager and Sangeeta is a housewife.

They have two children: Prathmesh, four, and Tulika, three months.

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HUANG WEIQUN AND CAI YUWEI, FROM CHINA

"We hardly use any energy!" - Huang Weiqun

Huang Weiqun and her son Cai Yuwei, 18, live in Shanghai. Huang works as a cleaner.

They live in a one-bedroomed apartment and use a kitchen shared by 11 others.

Quentin Sommerville went to meet them.

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