3-6 Carbon Cycle through the Biosphere

Carbon, the basic building block of the carbohydrates, fats, proteins, DNA, and other organic compounds necessary for life, circulates through the biosphere in the carbon cycle shown in Figure 3-19.
The carbon cycle is based on carbon dioxide (CO2) gas, which makes up 0.038% of the volume of the atmosphere and is also dissolved in water. Carbon dioxide is a key component of nature' s thermostat. If the carbon cycle removes too much CO2 from the atmosphere, the atmosphere will cool, and if it generates too much CO2, the atmosphere will get warmer. Thus, even slight changes in this cycle caused by natural or human factors can affect climate and ultimately help determine the types of life that can exist in various places.
Terrestrial producers remove CO2 from the atmosphere, and aquatic producers remove it from the water. These producers then use photosynthesis to convert CO2 into complex carbohydrates such as glucose (C6H12O6).

中文翻譯
碳，碳水化合物的基本组成部分，油脂、蛋白質、脫氧核糖核酸和其他有機化合物生活的必需，透過在圖3-19上顯示生物圈的碳循環流通上。

碳循環根據二氧化碳(二氧化碳)氣體，他占大氣容量的0.038%和並且溶解在水中。二氧化碳是自然界恆溫一個關键部件，如果碳循環從大氣取消許多二氧化碳，大氣將會冷卻。並且，如果它引起許多二氧化碳，大氣將得到加熱。因此在自然或人為因素造成的這個週期上的甚而輕微的變化可能影響氣候以及最後幫助確定可能以各種各樣的地方存在生活的種類。

地球生產者從大氣消除二氧化碳，並且水生生產者從水消除它，這些生產者然後使用光合作用轉換二氧化碳成複雜碳水化合物例如葡萄糖。