Continued application of herbicides:

This environmental system includes at least one community and its non-living environment.

Does the total mass of organisms at a higher trophic level have to be less than the total mass of organisms at any lower trophic level?

Critics of the cradle-to-grave product design suggest that companies using this type of design should be more ecologically sustainable and use a __________ product design.

Coal is mostly nitrogen, but it also contains small percentages of impurities.

What is driving down the cost of electricity from solar power?

____________ transform solar energy into potential energy of chemical bonds within tissues.

The predatory starfish species Pisaster ochraceus is an example of a _______ species, because despite their relatively low abundance or biomass, their removal can lead to large-scale changes in community structure.

A large percentage of Earth’s atmosphere consists of _______.

The global environment consists of these large spheres.