surefish has teamed up with an independent service that allows you to compare gas and electricity tariffs. You can use it to find a cheaper deal or search for a green energy provider.

The average savings from switching supplier are a healthy £140 a year, and if you do switch Christian Aid will receive up to £40 from your new supplier.

To find the best gas & electricity deal for you, try the energy calculator here. The service:

• Compares all suppliers in the UK
• Is simple to use and only takes a few minutes
• Will email your results to you to study offline
• Is accredited by the EnergyWatch Commission

If you do decide to switch, just complete the online forms. The new supplier will then get in touch to take you through the straightforward process of changing suppliers.

Take a couple of minutes to give it a go now.

Once you've switched up to £40 will be donated to Christian Aid on your behalf. Click here to read more about how Christian Aid spends the money.

For all kinds of ideas on energy conservation at home, from low-energy light bulbs to DIY draught exclusion go to the Energy Saving Trust website.

If you want the ultimate in clean consciences and energy, switch to Unit[e] who offer the only 100 per cent renewable domestic supply service in the UK.