Like Terms

Unlike the paper mills used earlier in this century, which produced paper at an unreasonably high cost to the environment, the operation of modern paper mills can, when used conscientiously, be far less detrimental to the environment.

	the operation of modern paper mills can, when used conscientiously, be far less detrimental to the environment
	modern paper mills can be far less detrimental to the environment when used conscientiously
	modern paper mills can, when used conscientiously, be far less detrimental to the environment
	the operation of modern paper mills can be used more conscientiously, with less detriment to the environment
	modern paper mills can operate in such a way that, when used conscientiously, they are far less detrimental to the environment