This document discusses three major environmental issues in Hawaii: invasive species, plastic debris pollution, and coastal erosion. Invasive species like deer, goats, ants, and frogs have disrupted Hawaii's ecosystem. Plastic makes up nearly half of shoreline trash in Hawaii, carried by ocean currents from around the world. Scientists project that beaches will erode 20-40 feet by 2100 due to coastal erosion, threatening Hawaii's economy and environment.