Fuel for Robots

The Martians used a mixture of three fuels for their robots.

Two were very benign chemicals, one was mostly water.

But the Green Stuff as we called it would burn a hole in almost anything.

It was mixed with the other two and that cut down on this burning properties.

The fuels were stored in the thick parts of the legs and the arms of the robots.

They had a very limited supply so it limited the number of robots they could deploy.