Thank you for the fantastic support you gave to Earth Hour last year. This year Earth Hour has an international challenge to inspire the global community, and again we need your help at 8pm on March 29 to switch off your lights and take action against climate change.

Flick the switch to re-register for Earth Hour 2008

This will automatically register you and you'll receive a confirmation email with a link to your own Earth Hour page which allows you to see the direct effect that you are having when you invite friends and family to get involved.

If your details have changed, or you'd like to sign up with a different email address, please register at www.earthhour.org/sign-up/

Spreading the word

We'd love you to tell your friends, family and workmates about Earth Hour and talk to them about the issues and encourage them to join you in creating a sustainable future.

Don't forward this email as it contains a unique code linked to your personal information. Instead, let them know about www.earthhour.org