Geography of Taiwan water supplies, and trade in endangered species. Though regulation of sulfate aerosol emissions from petroleum combustion is becoming stringent, acid rain remains a threat to the health of residents and forests. Atmospheric scientists in Taiwan estimate that more than half of the pollutants causing Taiwan's acid rain are carried from mainland China by monsoon winds. Geography of Taiwan Taiwan, formerly known as Formosa, is an island in East Asia; located some off the southeastern coast of mainland China across the Taiwan Strait. It has an area of , which includes other nearby islands such as Penghu (). The East China
Green Island, Taiwan Green Island, Taiwan Green Island (Mandarin Pīnyīn: "Lǜ Dǎo"; Hokkien POJ: "Le̍k-tó") is a small volcanic island in the Pacific Ocean about off the eastern coast of Taiwan. It is at high tide and at low tide, making it the Republic of China's seventh-largest island. The island is administered as , a rural township of Taitung County and one of the county's two offshore areas (the other being Orchid Island). The island once served as a penal colony for political prisoners during Taiwan's period of martial law, although today it is primarily known as a tourist hotspot. The name "Green