Earth Day 2015: Biking, Hiking and Planting Trees

mobilize – v. to bring (people) together for action

fundraiser – n. a social event held to collect money for a political party, charity, school, etc.

hike – v. to walk a long distance especially for pleasure or exercise focus – n. a main purpose or interest

wind turbine – n. a tall structure that has large blades attached to an engine and that is used to produce electricity