The most abundant source of methane in the globe is coal-fired power plants.
It has to be a, b or d then.
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Answer:never gonna give you up, never gonna let you down or desert you
Explanation:ur fat lol haha xd
1) all of the above
2) rocketry
3) 1
4) not sure about this one because magnitude of one was the brightest then 2, then 3. 6 was the least brightest and 6+ or -1 or 0 or you could say, below 1 did not exist at that time..