Condensation on a cafe window. Photograph: Martin Godwin for the Guardian

Leo Hickman: Dehumidifiers use electricity to extract moisture from indoor air helping to minimise damp

Insulating and draughtproofing floorboards with Bona gap master. Photograph: Caramel Quin

Caramel Quin: The small gaps between boards add up to the equivalent of a small window. No wonder your toes are feeling chilly

Used batteries in storage awaiting disposal. Photograph: Image Source/Rex Features

Leo Hickman: Researchers currently seem to be concentrating on developing clean energy sources - but storage is just as important

Workmen install solar panels on to homes in Delabole near Bodmin in Cornwall, April 27, 2011. Photograph: Simon Burt/PA

Leo Hickman: The solar energy industry needs the electricity it produces to cost the same as electricity generated from fossil fuels

A red ball being used to promote Aids charities during Chelsea v West Ham United on 13 March 2010. Photograph: Tom Jenkins for the Guardian

Leo Hickman: Following a football team can involve lots of travel - but some clubs are now starting to think about their carbon footprints

A sweatshop in Bangladesh. How much success have campaigners had? Photograph: Panos

Bryony Moore: Progress might be slow, and a sweat-free high street is still a long way off, but it's not all doom and gloom

What will the cuts mean in financial terms? Photograph: Sarah Lee for the Guardian

Duncan Clark: What will the cuts mean in financial terms and will it be possible to install solar before the cuts kick in?

Climate change arrives in the world of cult video game Minecraft thanks to a carbon emissions hack developed at the Stockholm Green Hackathon

An image of a green tunnel for the planned High Speed 2 (HS2) rail line. Photograph: Rail Link Engineering/HS2

Leo Hickman: Supporters say HS2 will reduce the number of domestic flights in the UK, but critics say it could increase net emissions

Suzanne Goldenberg: Chris Paine's 2006 documentary, Who Killed the Electric Car? excoriated US car makers – but his new film is likely to get a much warmer reception

Thomson Airways ran a biofuel-powered flight to the Canary Islands in October 2011. Photograph: Dave Thompson/PA

Leo Hickman: Airlines are starting to test biofuels on commercial routes, but 'sustainable' alternatives to kerosene remain controversial

The ideal present for a 'green' baby will be both useful and environmentally friendly. Photograph: Image Source/Rex Features

My sister is keen to raise her baby in a 'green' way but does not want things that will clutter the house

Adjusting a central-heating thermostat. Photograph: Jeffrey Blackler/Alamy

Leo Hickman: Green taxes aim to drive up the cost of fossil fuels and help fund investment in renewable alternatives - but they remain controversial

Attached to your car? Cutting the ties can save you a lot of money over a year. Photograph: John Stillwell/PA

When our trusty old Saab got sent to the scrap heap, we decided to become a family without a car. How did we get on?