We are working on hashcash.io - replacement for captcha. no more frustration to guess what google meant, just computer proof of work and you are good to go
Please, do not drain my batteries, waste resources of my planet and make me (or my employer, or my coffee shop, or my train company, or my library) pay electricity to prove I'm not a robot.
Please, do not make Internet an energy hog more than it already is.
Your last statement theoretically could be addressed by tweaking the algorithm settings such that it consumes at most [the time it takes for a human to solve reCaptcha] x [average power consumption of a smartphone]. Not sure if it would still hold its purpose, though.
Looks interesting, and fairly attractive presentation... but how does it work? This is essential to describe, but are no details about that on your front page!
Also, your text needs some work; there are grammatical errors and some phrases could be improved. (I can help with this, if you want.)
