The Great Barrier Reef's fragile ecosystem is at risk of plankton and algae overgrowth. The main cause of this issue is . A. climate change B. deforestation C. fallout contamination D. nuclear testing

The war began as a fight between mayans and the landowners of the country. the main causes of the guatemalan civil war was started by the greed of the united fruit company, the fear of communism, and the racism toward the  mayan  people.