Green Movement That Asks You to Turn Off Lights
This page is the CodyCross answer for the clue below from Chile, Group 2299, Puzzle 3 (White Sand Beaches).
Question is: Green Movement That Asks You to Turn Off Lights
and the answer is: EARTHHOUR
Word Meaning:
EARTH — Alternative letter-case form of Earth; our planet, third out from the Sun.
Definitions from Wiktionary.