Marvel's Guardians of the Galaxy Vol. 2 hits theaters May 5, but you can help defend our blue planet before then by participating in the #GrootDanceBomb challenge. Inspired by the adorable, groovy ...

Earth Day gets interactive today as the City of Denver invites residents to learn about fuel-efficient vehicles, biodiesel, proper recycling measures and other ways to proactively save the planet.

EDITOR’S NOTE: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...