What is algin? Diatomaceous earth used as an insulating material Brown algae A substance produced by brown algae used to thicken foods. Diatom shells

Are major food source for ocean life, They produce much of Earth's oxygen through photosynthesis, Chemicals in algae are used to treat ... When they die their shells accumulate at the bottom of the ocean as diatomaceous earth ... What is brown algae ... It also produces algal extracts like algin, carrageenan, and agar.