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The nucleus of an atom contains protons and electrons.

The human activity known as artificial eutrophication can sometimes introduce too many nutrients into a lake, which can cause some species to flourish (algae, bacteria) while harming other species (some fish).

Select all correct answers. Select the health impacts from air pollutants.

The figure below is an example of ________________, which is designing buildings to maximize absorption of sunlight in winter while keeping the interior cool in the heat of summer.   

Several populations of different species interacting with one another is called 

Select all correct answers. Select the health impacts from air pollutants.

The figure below is an example of ________________, which is designing buildings to maximize absorption of sunlight in winter while keeping the interior cool in the heat of summer.   

The figure is showing what type of mining?   

Several populations of different species interacting with one another is called 

Several populations of different species interacting with one another is called