What human activity produces the most methane gas?

This is because of human activities like fossil fuel use and intensive farming.

Explanation: HOPE IT HELPS

littering streams           is the answer

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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