By most standards of clean air and water published from government sources, the environment is ______ than it was in 1975.

Name: By most standards of clean air and water published from government sources, the environment is ______ than it was in 1975.
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Since 1975, significant environmental regulations and initiatives have been implemented in many countries, leading to substantial improvements in air and water quality, thus making the environment much cleaner by more than 25% by most measures.

By Most Standards of Clean Air and Water Published from Government