For decades, mahogany, ebony, rosewood and other rare tropical hardwoods have been extensively logged to produce valuable wood products, particularly guitars and other instruments. Increasingly aware of the impacts to forests and communities from over-harvesting, many instrument manufacturers have taken steps to make their supply chains more sustainable. Now, musicians are joining the call to make sure guitars and other instruments are made from legal, sustainably sourced wood. Last week the Environmental Investigation Agency and REVERB released a video featuring artists such as Jason Mraz and Michael Franti urging consumers to find out where their wood comes from.