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Carbon dioxide (chemical formula: CO2) or carbonic acid substance is a chemical compound composed of two oxygen atoms covalently bonded to a carbon atom. He is a gas at standard temperature and pressure and exists in Earth's atmosphere. The average concentration of carbon dioxide in Earth's atmosphere roughly 387 parts per million by volume [1] although this amount can vary depending on location and time. Carbon dioxide is an important greenhouse gas because it strongly absorbs infrared waves.

Carbon dioxide is produced by all animals, plants, fungi, and microorganisms in the process of respiration and is used by plants in the process of photosynthesis. Therefore, the carbon dioxide is an important component in the carbon cycle. Carbon dioxide is also produced from the byproduct of fossil fuel combustion. Inorganic carbon dioxide expelled from volcanoes and other geothermal processes such as hot springs.

Carbon dioxide has no liquid form at pressures below 5.1 atm, but immediately becomes solid at temperatures below -78 ° C. In solid form, carbon dioxide is commonly called dry ice.

The study aims to determine the influence of sulfur water on the growth of sheep, directly or indirectly. What is meant by direct is to provide the sulfur water directly to the animals through the ration that is indirectly defined in the ration were not given water to sulfur, but only based on sulfur content that already exists in the mmput (rations). The sulfur is the water that is hot water that smelled of sulfur, which is often used for tourism.

Photosynthesis is a biochemical process of formation of food substances or energy that is carried out glucose plants, algae, and some types of bacteria with nutrients, carbon dioxide, and water and sunlight needed energy aid. [1] Almost all living things depend on energy produced in photosynthesis. As a result of photosynthesis becomes very important for life on earth. [1] Photosynthesis is also credited with producing most of the oxygen found in Earth's atmosphere. [1] The organisms that produce energy through photosynthesis (photos meaning light) is called a fototrof. [1] Photosynthesis is one one way in photosynthetic carbon assimilation due to free carbon from CO2 bound (fixed) into sugar as energy storage molecules. [1] Another method adopted is the organism to assimilate carbon through chemosynthesis, which carried by a number of sulfur bacteria. [1]