Answer: The process that happens during primary wastewater treatment is:
A. Insoluble particles are removed by settling.
Explanation: Settling is an operation that removes suspended particles in the water to be treated.
When the pressure on a sample of a dry gas is held constant, the temperature and the volume will be direct proportion?
The combustion of fossil fuels like coal, petroleum and other factory combustibles is a major cause of air pollution. ... Meanwhile, emissions caused by gasoline-burning vehicles – i.e. CO, CO², nitrogen oxides, particulates and water vapor – are also a significant source of air pollution.
I say Air Pollution
All cells have cell membranes, and the membranes are flexible. So animal cells can have various shapes, but plant cells only have the shapes of their cell walls. That's nice for plants, because it gives them the ability to grow up and out, where they can get lots of sunlight for making their food.