Science 107 Essay

651 Words Mar 23rd, 2009 3 Pages
Atmosphere regulates temperature of earth surface.

Atm. with clouds reflect %30 of the solar ultraviolet (UV), reabsorbs 45% of infrared radiation (IR)

Composition of dry air: Nitrogen (N2-78), Oxygen (O2-20), Argon (Ar-0.93), Carbon dioxide (CO2-0.03), Others (0.01)

NITROGEN: Proteins contain N2, essential for plant and animal life.

OXYGEN: Essential in respiration (solunum), produce energy by reaction

• Ex) reaction of glucose with oxygen=produce energy for animal and plant. Burning of fossil fuel.

CARBON DIOXIDE: essential for photosynthesis. Absorbs IR emitted by the earth with water vapor. Not pollutant but also greenhouse gas.

1. AIR POLLUTION

: COx, SOx, NOx, HYDROCARBONS, O3, POISONOUS METAL
…show more content…
FOSSIL FUELS

4. GLOBAL WARMING

← Human nature cause rise in global temperature in two ways: Greenhouse gases and Ozone layer depletion.

← GREENHOUSE GASES: Carbon dioxide(co2), methane(ch4), ozone, water vapor, nitrous oxide(n2o), CFC

← CO2 is key role in atm. to regulate temp.

← Some of the heat radiated form the earth surface is trapped by the CO2 and warms the atm. is called greenhouse effect.

← After industrial revolution greenhouse gases have increased. Because of:

← CO2(combustion of fossil fuels), CH4(methane-agricultural activities), N2O(nitrous oxide-agricultural activities), CFC(result only from domestic and industrial activities. Also for ozone layer depletion)

← Last 150 years the CO2 amount increased to 0.035% by volume because of usage fossil fuels. By 2100 it is estimated that CO2 volume will be 0.070% to 0.075%

GLOBAL WARMING AND CLIMATE CHANGE:

← Changes in snow covered areas melting of permafrost, flooding coastal region such as Netherland...

← Change in boundaries of vegetation region, change in type of species and decrease in biodiversity.

← CH4, o3,n2o, and

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