harmlessness造句

Treated sludge basically realized the harmlessness, reduction, the environment will not cause secondary pollution.

At present, the trench of development on the research of flocculant are chiefly: the high efficiency, low consumption, safety, no harmlessness and no two-time pollution.

And the last one, being an ecological economy, favors an environmental harmony, featuring the saving and cycling of resources, and, in practice, the carrying-out of reduction, resourcefulness and harmlessness.