From Selfies to Thunderclaps: 7 Ways to Pump Up Your Earth Day Celebrations

The latest report from the U.N. Intergovernmental Panel on Climate Change (IPCC) warns that a changing climate will cause an array of new environmental problems — and there's no better day to respond than on Earth Day

Over a billion people in 190 countries celebrate Earth Day each year with a variety of outdoor activities or action events, according to the Earth Day Network. The annual event, which began in 1970 and is celebrated on April 22, this year's global focus is on green cities and the need to make cities more environmentally resilient and communities more sustainable