danielmartinez91
19.05.2021 •
Biology
If the nearest star in our galaxy is 4.3 light-years away, then –
a
The star is 4.3 million AU away
b
The light we see left the star 4.3 years ago
c
The star is 4.3 x 1011 km away
d
The star formed 4.3 billion years ago
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Ответ:
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: