1) The greatest environmental threats facing the planet today include climate change and endangered species. Climate change is causing widespread melting of ice and snow and rising temperatures, while half of all species may be extinct by the century's end due to human activity. 2) Australia faces threats like drought, invasive species, climate change and loss of protected areas. 3) Indonesia faces threats including deforestation, water pollution, forest fires and endangered species. Deforestation occurs from human development and harms oxygen and air quality, while pollution, fires and deforestation threaten animals and disrupt ecosystems. 4) Deforestation was a major problem in Indonesia due to demand for wood and economic growth, though Indonesia is now