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[Spoil] คลิกเพื่อดูข้อความที่ซ่อนไว้Define
DO (Dissolved Oxygen)
The amount of oxygen that is dissolved in a liquid.
BOD (Biochemical Oxygen Demand)
The amount of dissolved oxygen needed by aerobic biological organisms in a body of water to break down organic material present in a given water sample at certain temperature over a specific time period.
Eutrophication
Eutrophication is defined as an increase in the rate of supply of organic matter in an ecosystem.
Nutrient
A nutrient is a chemical that an organism needs to live and grow or a substance used in an organism's metabolism which must be taken in from its environment.
NPK runoff (nitrogen, phosphorus, potassium)
Stands for Nitrogen, Phosphorus and Potassium.
Hydrologic cycle
the sequence of conditions through which water passes from vapor in the atmosphere through precipitation upon land or water surfaces and ultimately back into the atmosphere as a result of evaporation and transpiration —called also hydrological cycle
Greenhouse gas
A greenhouse gas is one of several gases that can absorb and emit longwave (infrared) radiation in a planetary atmosphere.
Greenhouse effect
The trapping of the sun's warmth in a planet's lower atmosphere due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface.
Heat energy
Heat energy is a form of energy that results from movement of atoms, ions or molecules in solids liquids or gases. It can be transferred from one object to another if the two objects have a temperature difference.
Agricultural activities
Agricultural activity is every activity that is directed to the production of organisms or parts of organisms which are of use for men to survive.

Gasoline
A liquid made from petroleum and used especially as a fuel for engines.
Combustion
Combustion is a chemical reaction chemical that occurs between a fuel and an oxidizing agent that produces energy, usually in the form of heat and light.
Carbon oxides (CO2, CO)
Carbon forms two important gases with oxygen: carbon monoxide, CO, and carbon dioxide, CO2. Carbon oxides are important components of the atmosphere, and they are parts of the carbon cycle.


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