From the NASA website on EARTH RIGHT NOW.
NASA invites you — and everyone else on the planet — to take part in a worldwide celebration of Earth Day this year with the agency’s #GlobalSelfie event.
The year 2014 is a big one for NASA Earth science. Five NASA missions designed to gather critical data about our home planet are launching to space this year. NASA is marking this big year for Earth science with a campaign called Earth Right Now, and as part of this campaign the agency is asking for your help this Earth Day, April 22.
While NASA satellites constantly look at Earth from space, on Earth Day we’re asking you to step outside and take a picture of yourself wherever you are on Earth. Then post it to social media using the hashtag #GlobalSelfie.