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Embryo transplants are pretty much exclusively used with surrogate mothers where the real mother cannot bear the child due to future complications. The sperm and egg are sourced from the couple wanting a child, germinated externally, then the germinated egg is implanted into the surrogate.  No dna from the surrogate is used, they become a … Read more
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All crops leech nutrients from the soil, which have to be replaced before the same soil can be used to grow another cycle of crops.  Modern farming uses fertiliser like ammonium nitrate to replace the nitrogen in the soil that plants consume in order to grow.  If they didn't add chemical fertilizers to the soil they wouldn't … Read more