The Clean Energy Water Clock is a sleek digital clock that uses only water as a power source. The clock creates electrical energy through an electrochemical reaction between the water and electrodes in the device, similar to a science fair potato clock.

The coolest part of this clock is that it is so efficient that it can create energy from moist soil, thus allowing you to grow small plants in the allotted chambers. The Clean Energy Water Clock is an attractive timepiece that doubles as a carbon sink, both reducing your impact and increasing your punctuality.