ABSTRACT
Algae are uni-or multi-cellular organisms which live in water or in wet locations and have chlorophyll (organic pigment capable of absorbing and transforming energy from sunlight) and is therefore capable of performing photosynthesis, namely transforming light energy into chemical, capturing carbon dioxide (CO2) to form complex organic compounds (along with water and mineral salts) and release oxygen (O2); this organic synthesis process, proposes that the algae are the true “lungs” of the planet Earth, that cover extensive woodlands, such as the Amazon rainforest. So, algae are primary producers, i.e., they are able to produce oxygen and organic compounds that serve as food for other living beings, fundamental to food chains of all aquatic ecosystems (Pereira 2015a, Pereira and Correia 2015).
