ocr: Antarctica is one oft the last great wildernesses on Earth. Its layer ofice, over 13,0001 ft. thick in places, has taken thousands ofyears to form. Its ecosystem is so fragile that even a footprint will leave its mark for years. Several species are unique to the continent, including Ring - penguins. A major ecological concemn 111 Antarctica is overfishing, particularly ofkaill, cod: and squid. Also of concern is the depletion ofthe ozone layer over Antarctica which may have adverse etfects of phytoplankton, the foundation ofthe food chain for marine life. In 1994,the IWC agreedto: a French pro ...
