Nokia is developing a global network of recycling companies to handle end-of-life mobile phones and accessories. Strict requirements are placed on these companies to ensure recycling is done in an environmentally compliant way. Nokia also runs various take-back and recycling programs for customers, including mail-in envelopes and drop-off events, to make recycling easy and raise awareness of options other than throwing devices away. External factors are increasing pressure on companies to meet new environmental standards around the world for substance restrictions, recycling, and other sustainability issues.