Each driver has a characteristic spatial and temporal scale at which it affects ecosystem services and human well-being. Climate change may operate on a spatial scale of a large region; political change may operate at the scale of a nation or a municipal district.
Amazon has several competitors in the electronics and general merchandise segment, many of which are brick and mortar rivals including Best Buy, Family Dollar, RadioShack, Staples, Target, Walmart, Sears, Big Lots, Delia and Systemacs.
Google Home vs. Amazon Echo: Alexa takes round 1. Amazon wins the battle, but the war is far from over. Editors' note, February 2, 2017: This piece has been updated with new details now that we're back from CES.