On the Earth’s surface, temperatures can swing from blistering hot to freezing cold. But dig a few hundred feet below ground, and the temperature is stable at between 10°C and 16°C (50°F and 60°F). The technology to tap that energy to heat or cool homes has been around for 70 years, but it’s only in the past few years that it has become feasible financially to deploy geothermal heat pumps at scale for ordinary consumers.
Cutting your home’s energy bills by digging a deep hole in the backyard
More of Today's Solutions
California’s first eight-hour grid battery just came online
BY THE OPTIMIST DAILY EDITORIAL TEAM The California grid has a timing problem. Solar runs from mid-morning through early evening. Demand peaks later. Batteries ...
Read MoreThese four small habits reduce the risk of stroke
Our small daily actions all contribute to our long-term health, especially when it comes to strokes. 80 percent of strokes are preventable, so lifestyle ...
Read MoreAnd the healthiest way to cook broccoli is…
We’ve previously reported on why broccoli is so great. Full of nutrients and antioxidants, it can help invigorate so many parts of our bodies. ...
Read MoreFriendships across income lines boost social mobility, study shows
BY THE OPTIMIST DAILY EDITORIAL TEAM A new study has found that friendships bridging economic divides can meaningfully improve social mobility—and even boost future ...
Read More
