Amazon's budget-friendly Smart Thermostat is on sale for its best price yet

Amazon's Smart Thermostat is down to just $47.99 today at Amazon. | Photo by Jennifer Pattison Tuohy / The Verge It's Earth Day, so in honor of the occasion, we're starting today's roundup with an excellent deal on Amazon's eco-friendly Smart Thermostat. Smart thermostats such as Amazon's can reduce and, in some cases, track your energy consumption. And they're also a great buy for bargain hunters given that they can lower your monthly energy bill. In honor of the holiday today, some retailers a...