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Tuvalu is the fourth smallest nation in the world with a population of 11,000. Tuvalu is made up of nine inhabited islands five which are coral atolls and four made of land rising from the seabed. The environmental challenges Tuvalu faces include the impacts if a changing climate increasing sea level rises and weather events, increasing salination.

The World's oceans play a crucial role for life on the planet. Healthy seas and the services they provide are key to the future development of mankind. Our seas are highly dynamic, structured and complex systems. The seafloor consists of vast shelves and plains with huge mountains, canyons and trenches which dwarf similar structures on land. Ocean currents transport water masses many times larger than all rivers on Earth combined.

Invasive alien species on islands have broad impacts across biodiversity, agriculture, economy , health and culture, which tend to be stronger than on contitents.