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.
While the Echo has been Amazon's flagship Alexa device, it's no longer alone. It's joined by Amazon's other Echo and Fire hardware, as well as a growing number of third-party devices. Here's a quick rundown: Amazon Echo (2nd Gen.)