The unusual amino acid selenocysteine is inserted into proteins via recognition with a specific factor. This is followed by incorporation when a UGA stop codon is encountered in association with nucleotide sequences called cis-acting selenocysteine insertion sequence elements (SECIS).'

it creates acid rain

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."