EARTH DAY

Earth Day, an international holiday to educate and raise awareness about environmental issues, is held on April 22 each year.

NASA has asked people to get outside and take selfies showcasing mountains, parks, rivers, lakes and the sky.

On Earth Day, the focus is on the planet's health. Nowhere is that more evident than on the ground in the Arctic.

The U.N. decided the world needs a Toilet Day. That's because more than 2.5 billion people do not have access to decent sanitation.

The fifth Earth Day of Barack Obama’s presidency finds campaign promises still unfulfilled, but environmental advocates are still pushing.

From Earth Day 1970 to Earth Day 2013, one of the world's first environmental campaigns has come a long way.

The International Mother Earth Day is observed April 22 and the world is already setting agendas to increase awareness about Earth's natural environment, and to make sure that we provide clean water and pollution free air to breathe for the future generations.

As Earth Day approaches on April 22, organizers view 2012 as a pivotal year to bring the environmental issues facing the planet to the forefront of the global political agenda.

Earth Day 2012 is on April 22, and will be observed around the world with events and activities highlighting environmental concerns and planetary health issues.

Earth Day is the annual celebration of the environment and a time to assess the work still needed to protect the natural gifts of our planet. It affirms that environmental awareness is part of our consciousness and that the idea of protecting the environment has moved into the mainstream.

NASA has released breathtaking photos of the earth in honor of Earth Day, here are ten of the best.

The world turned off its lights on March 26 for an hour from 8.30 p.m. local time as a show of support for tougher action to confront climate change.

Earth Hour has already passed for Asia and Australia. For the Middle East and Africa, it's hours away. For North America and Europe, there is plenty of time to prepare for Earth Day.

Each year on April 22, we celebrate earth day marking the anniversary of the birth of the modern environmental movement in 1970.

The U.S. government’s Environmental Protection Agency is marking the celebration of Earth Day 2009 on Wednesday by promoting the use of clean energy sources.