English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

2007-10-28 13:50:00 · 2 answers · asked by piinkpolkadots 1 in Science & Mathematics Physics

2 answers

When water evaporates, it leaves pollutants behind, though it will also pick up pollutants from the air on the way back down - think acid rain. Ground water gets purified by passing though sand and porous rock, which act as natural filters.

2007-10-28 13:56:30 · answer #1 · answered by injanier 7 · 0 0

http://www.wisteme.com/question.view?targetAction=viewQuestionTab&id=944

2007-10-28 21:01:09 · answer #2 · answered by Anonymous · 0 0

fedest.com, questions and answers