energy 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 1:20 Former educator's company helps teach via music, performance 3:51 Ford marks 60th anniversary of the Mustang 1:06 Watch: Experts say get kids involved early when talking finances 2:23 Tesla laying off more than 10% of workforce 1:09 Most people say their income tax refund is spent already