Use of English · Part 3
Coral reefs, which sustain roughly a quarter of all marine (0) BIODIVERSITY (DIVERSE), are among the most imperilled ecosystems on the planet. Ocean (1) .......... (ACID), driven by rising atmospheric carbon dioxide, is steadily weakening the calcium carbonate skeletons on which reef structures depend, while mass…
Desbloqueja tots els exàmens, simulacions il·limitades, les 80 fases del joc i molt més.