Earth Day April 19, 2017 5:04 pm What Green Initiatives Are 5 of the Most Valuable Companies Involved In? In honor of Earth Week, NBC looked at 5 of the most valuable companies to see what kind of green initiatives they are engaged in. US & World Videos 1:36 Arizona Senate repeals 1864 abortion ban 3:37 4.1-magnitude earthquake shakes Corona 1:40 Democrats say Big Oil misled public for decades about climate change 2:56 Police putting up barricades on UCLA campus after overnight brawl 4:00 Firecrackers thrown at pro-Palestinian encampment during protester clash at UCLA