Documents Scientists found that, over a period of 200 years, a mountain pond was transformed into a meadow....

Scientists found that, over a period of 200 years, a mountain pond was transformed into a meadow. During that time, several communities of organisms were replaced by different…

Documents Sustainable work practices

Resource efficiency issues You can save the energy you use for: Lighting Heating and cooling Using equipment Save energy you use for lighting: Use energy efficient lighting…