1. How many biogas systems were in operation in the U. S. in 2017?

2,200 operational biogas systems

Biogas systems turn organic material into soil amendments and gaseous fuel by using anaerobic digestion, a natural, biological process in a sealed tank. There are more than 2,200 operational biogas systems in the U.S. today with the potential for over 13,500 new systems to be built

Explanation:

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As of August 2017, AgSTAR estimates, 250 manure anaerobic digester biogas recovery systems were in operation at commercial livestock facilities in the United States. The full potential to provide renewable energy is much greater: an estimated 8,100 U.S. dairy and swine operations could support biogas recovery systems.

Explanation:

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.

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