claim: Coral atolls grow as sea levels rise.
evidence: Healthy tropical coral reefs grow horizontally from 1 to 3 cm ( 0.39 to 1.18 in ) per year, and grow vertically anywhere from 1 to 25 cm ( 0.39 to 9.84 in ) per year; however, they grow only at depths shallower than 150 m ( 490 ft ) because of their need for sunlight, and cannot grow above sea level.