Some natural resources, such as wood, can be replaced while others, such as water and natural gas, are of limited supply. Top nonpoint source pollution pollution from numerous widespread locations or sources that have no well-defined points of origin. Examples include leaching of excess fertilizer from fields and acid rain. Top nutrients the materials that are necessary for growth and life, such as water, minerals, fats, and carbohydrates. Top organic material substances that contain carbon, as well as other chemical elements.
Plants are a primary form of organic material.
Secondary forms include human and animal excrement. Top organic waste waste derived from animal and plant materials. Waste that contains carbon compounds. At room temperature it is a colorless solid with a strong, pungent odor, usually associated with mothballs. Very high exposures can cause dizziness, headaches and liver problems.