Earth Hour is from 8:30 PM to 9:30 PM tonight.
And Bayshore Broadcasting News wanted to know if are going to be turning off your lights to save energy.
Everyone we spoke to agreed that they will try to reduce their power usage for that one hour later this evening.
One man said that Earth Hour is really important, because it teaches the younger generation that they need to conserve energy.
And one woman also said that most of her friends, if not all of them, will be taking part in Earth Hour as well.
Most people also agreed that Earth Hour will make a difference, but only if everyone takes part.