Natural systems on the land are in big trouble too, but the problems are more obvious, and some actions are being taken to protect trees, watersheds and wildlife.
Sistem-sistem alam di daratan pun akan mengalami kesulitan besar, tetapi masalahnya sekarang lebih jelas, dan berbagai tindakan sudah dilakukan untuk melindungi pohon-pohon, sumber air, dan margasatwa.