Is there an energy-alternative for a city's mobile Diesel Sidewalk Cleaner?

Question

My city uses a horizontal portable diesel-fired hot high pressure washer unit to clean the sidewalks downtown. Is there an alternative-energy unit that I can suggest to the city public works dept. that would (a) not use fossil fuel; and (b) give them the hot water & pressure needed to do the job? Two men operate the present unit, rolling it up and down main street twice a week, emitting a lot of fumes. This is a big tourist city, so a clean downtown is very important.

Present unit looks like http://www.dcs1.com/del/pressure-washers/4020peo.html

Answer 1

Use electric motors. It saves people and gas and CO2. Or just use the unemployed. Or if you have to use the chaain gang

Answer 2

Not an alternative that wouldn't simply shift the energy burden somewhere else.

Answer 3

chain gang, get those criminals sitting in prison to do it

Answer 4

The chain gang is a good thing. Get those guys to some community service. I gotta think they can make a broom that can be used as a weapon.

And the shackles are reusable and recyclable

no joke, it would work - but we cant do that right? they need their televisions and weight sets to better themselves not pay back a society they enacted crimes against - that would be against their rights.

Criminals - enough said

Answer 5

I saw them using scotch broom brooms in Europe to clean the street.   Hire a few unemployed people to sweep them every day.