The reason of greenhouse?

There is increasing emission of greenhouse (GH) gases around the world. GH gases including carbon dioxide (CO2), nitrous oxide (N2O), CFCs and methane. GH gases can trap heat in the atmosphere and rise the temperature of the world.

Due to industralization (工業化) and urbanization (城市化), industries and power plants (發電廠) need a lot of energy. The burning of fossil fuels (化石燃料) (like coal & oil) may give out a lot of GH gases.
domestic (家居用) (household) use of fossil fuels rises too. it is because of rising living standard (生活質素) of people. many people now have cars, and other electric appliances(電器), such as air conditioner, heater, refrigerator, etc. High level of electricity usage leads to high level of greenhouse gas emission.

備註:
CO2: 二氧化碳
N2O: 氧化亞氮
CFCs: 氯氟碳
methane: 沼氣 (甲烷)

The greenhouse effect origin mainly is the greenhouse gas excessive discharges. Because the greenhouse was mad the physical ability 夠 storage heat energy, makes the heat energy rise which the Earth stores up, creates the whole world to be warm