矛盾
发表于 2025-3-28 16:06:56
Indicators of Environmental Quality: an Overview,se questions, we first must consider exactly what we include in the term “environment.” If we restrict our consideration to overly simplified definitions, such as the amount of a specified pollutant in air, we have very little difficulty in measuring environment. However, as we broaden our definitio
Gourmet
发表于 2025-3-28 19:49:52
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冲突
发表于 2025-3-29 00:02:03
Uses of Environmental Indices in Policy Formulation,nt, where emotions can run high, hard facts are often of critical importance. If we are to achieve effective management of our environment, we will need comprehensive data about the status and changes in the air, water, and land. Optimally, these data should be organized in terms of indices that in
ostracize
发表于 2025-3-29 05:17:00
Evaluation of Natural Environments,nce on the planet. I define “natural environment” as any place where organisms exist in mutual relations that are free of direct management or other drastic human intervention; but presence or absence of people is not a criterion. Plant succession is a key concept for recognizing the vast number and
痛恨
发表于 2025-3-29 10:32:25
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Irksome
发表于 2025-3-29 15:11:53
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flourish
发表于 2025-3-29 17:15:59
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强制令
发表于 2025-3-29 21:31:58
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拖债
发表于 2025-3-30 03:00:38
Biochemical Indicators of Environmental Pollution,about 100 years ago of the effect of sulfur dioxide on the vegetation surrounding smelters; and to the observation,. around the turn of the century, of the effect of pollutants on the population of flora and fauna living in natural waters. Since that time, our knowledge of the biological effects of
FRAUD
发表于 2025-3-30 06:38:38
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