The three main environmental issues facing Hawaii are invasive species, trash, and water pollution. Invasive species such as ring-nosed parakeets negatively impact biodiversity and can cause extinction of native species. Large amounts of trash continue to pollute Hawaii's beaches and oceans, with seabirds and marine life ingesting plastic. Water pollution is also a problem, with testing finding many waters failing to meet public health standards due to pollution from sources like Marisco Limited.