EARTH HOUR saved us 30 tonnes of CO2 emissions.

IT was very heartening to see the support from Brigitte Schorn for Earth Hour (Irish Examiner, Tuesday 31 March), and I wish to thank Brigitte and all of the other people who took part in this event, which resulted in increased energy savings in Ireland and around the world.

The floodlit cream shells of the famed Opera House dimmed today as Sydney became the world’s first major city to plunge itself into darkness for the second worldwide Earth Hour, a global campaign to highlight the threat of climate change.