Compléter WaterVersion en ligne Why we use water and problems with water par ioanna ziaka 1 sanitation sustainability pesticides resources temperature biodiversity oil deforestation waste pollution diseases One big problem is water . There are many causes : dumping of industrial , increase of and . In the same way , we use in agriculture pollute underground water . On top of this , there are also accidents with ships that spill in the sea . What is the result ? Disappearance of at aquatic ecosystems and for humans . For all these reasons we must ensure water and water for all people on the planet .