The Ganges is threatened by pollution, overextraction of water, climate change, and dam construction. It is home to over 500 million people and many endangered species, such as the Ganges river dolphin and the Gharial crocodile.
The Mekong is threatened by hydropower development, overfishing, sand mining, and climate change. It is the lifeline of Southeast Asia, supporting over 60 million people and a rich biodiversity, including the Irrawaddy dolphin and the Giant Mekong catfish.
The Nile is threatened by water scarcity, population growth, pollution, and dam construction. It is the longest river in the world, and the source of livelihood for over 250 million people and many cultural and historical sites, such as the pyramids and the temples of Luxor.
The Yangtze is threatened by pollution, overfishing, dam construction, and invasive species. It is the longest river in Asia, and the most biodiverse river basin in the world, hosting the endemic Chinese paddlefish, the Yangtze finless porpoise, and the Giant panda.
The Amazon is threatened by deforestation, mining, oil exploration, and climate change. It is the largest river by discharge and the second longest in the world, and the most diverse ecosystem on Earth, harboring more than 10% of the world's species, including the Amazon river dolphin, the Green anaconda, and the Jaguar.