Describe three major environmental challenges facing Oceania.

Answer:

Three major environmental challenges facing Oceania are climate change and rising sea levels, damage to marine ecosystems, and pollution and habitat loss. Rising seas threaten low-lying islands with flooding and saltwater intrusion. Warmer, more acidic oceans contribute to coral bleaching, while overfishing and pollution also harm reefs and other marine habitats. Development and resource use can destroy or fragment coastal and island ecosystems.