[Nethra K Putti]

FLUXES OF POLLUTANTS & TRACE GASES TO THE ATMOSPHERE

SPECIES = SOURCE = NATURAL = ANTHROPOGENIC
1. CO2 (carbon dioxide) = respiration , fossil fuelburning, land clearing , industrial processes = 3,70,000 = 29,000

2. CH4 (methane) = rice paddies & wetlands, gas drilling, landfills, animals, termites = 155 = 350

3. CO (carbon monoxide) = incomplete combustion, CH4 oxidation, biomass burning, plant metabolism = 1580 = 930

4. NMHC (non methane hydrocarbons) = fossil fuels, industrial uses, plant isoprenes & other biogenics = 860 = 92

5. NOx (nitrogen oxides) = fossil fuel burning , lightning, biomass burning, soil microbes = 90 = 140

6. SOx (sulphur oxides) = fossil fuel burning, industry, biomass burning volcanoes, oceans = 35 = 79

7. SPM (suspended particular materials) = biomass burning dust, sea salt, biogenic aerosols, gas to particle conversion = 583 = 362

note : the numbers given under natural & anthropogenic column is : millions of metric tons per year .