Earth Hour, when major landmarks go dark for the planet, is known as "the biggest hour for Earth." Here's what else to know about the annual, globally recognized event.
Earth Hour, when major landmarks go dark for the planet, is known as "the biggest hour for Earth." Here's what else to know about the annual, globally recognized event.
Earth Hour, when major landmarks go dark for the planet, is known as "the biggest hour for Earth." Here's what else to know about the annual, globally recognized event.
Earth Hour, when major landmarks go dark for the planet, is known as "the biggest hour for Earth." Here's what else to know about the annual, globally recognized event.
Earth Hour, when major landmarks go dark for the planet, is known as "the biggest hour for Earth." Here's what else to know about the annual, globally recognized event.