Nonpolluting

adj.hopeful, kindprofessional

What it means

Operating without releasing substances or waste that contaminate the surrounding environment.

Reach for it when describing a process or technology whose normal use avoids pollution at the point being considered

The city is testing nonpolluting buses on its most crowded route.

everyday
clean
a concise public label is supported by a clearly stated environmental measure
not when Clean is vague and can hide pollution from manufacturing, fuel production, or disposal.
everyday
green
broad informal praise for environmental benefit is appropriate
not when Green is too elastic for a technical claim about actual releases.
professional
low-emission
the technology reduces pollution substantially but does not eliminate it
not when Low-emission is the honest claim when pollution is reduced rather than eliminated.
professional
zero-emission
the relevant operation produces none of a specified emission
not when Zero-emission must name its boundary and pollutant; it does not cover every environmental harm.
formal
environmentally benign
evidence covers wider ecological effects beyond pollution alone
not when This stronger phrase requires lifecycle evidence, not only clean operation.
formal
pollution-free
the defined process produces no pollution within a stated boundary
not when Pollution-free sounds absolute unless the system limits and lifecycle are explicit.

nonpolluting technology
Nonpolluting technology kept exhaust away from the school entrance.
nonpolluting process
The factory replaced its solvent wash with a nonpolluting process.
nonpolluting transport
Reliable nonpolluting transport made the valley quieter as well as cleaner.

Environmental claims need a stated boundary; zero pollution during use does not establish a pollution-free lifecycle.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.