April 22 marks the 55th anniversary of Earth Day, the worldwide annual event that fosters environmental awareness and champions conservation initiatives designed to curb the ravages of climate change. This year’s theme—Our Power, Our Planet—invites 1 billion supporters in 192 countries to unite behind renewable energy with the goal of tripling the global generation of clean electricity by 2030.

“For years, we have been fed the lie that only fossil fuels can power the planet. That is not true,” says Denis Hayes, organizer of the first Earth Day and board chair emeritus of EarthDay.org. “By the 2030s, the largest source of electricity generation on the planet will be solar power.”

Our reliance on fossil fuels for energy has had dire consequences, releasing greenhouse gases and toxic chemicals that drive climate change, pollute the environment and threaten human health. According to EarthDay.org, cutting greenhouse gas emissions diminishes the risk of heatwaves, floods and the spread of infectious diseases. A reduction in air pollution is also expected to decrease respiratory and cardiovascular diseases such as asthma and strokes.

The technology already exists to meet global energy needs with clean, affordable and renewable power from solar, wind, geothermal, tidal and hydro sources—all of which can be stored in batteries and fuel cells. Wind and solar have become the most cost-effective sources of power, surpassing traditional fossil fuels in affordability. Renewable energy represents a huge economic opportunity estimated to create 14 million new jobs globally, according to the International Energy Agency, an intergovernmental organization that provides data, analysis and policy recommendations on the global energy sector.

Forty-nine countries currently generate more than half of their electricity from clean sources, including Canada, Switzerland, Austria, New Zealand, Brazil, Norway, Sweden and Denmark, while Iceland produces virtually all of its power from renewable sources.

“We need people power to support the big switch to renewable energy,” says Kathleen Rogers, president of EarthDay.org. “We encourage everyone to talk to your local mayor, boss, neighbors, community leaders, and local and national legislators to explore and to champion switching to renewables.”

There are multiple ways to get involved and celebrate Earth Day in our community.