The gender of a baby green sea turtle is determined by the temperature the egg experiences during incubation. When temperatures are warmer, more females are born while. Conversely, when temperatures are cooler, more are males born.
Manufactured until 1977, and banned by the Environmental Protection Agency in 1979, pentachlorobiphenyls (PCBs) are chemicals still commonly found in the environment because they break down slowly. (2011-11-17)