EVOLUTION OF THE ATMOSPHERE

PHASE 1 - VOLCANOES GAVE OUT GASES
Points (1,2,3)

PHASE 1 - VOLCANOES GAVE OUT GASES CONTINUED...
Points (4,5)

PHASE 2 - GREEN PLANTS EVOLVED AND PRODUCED OXYGEN

PHASE 3 - COMPLEX ORGANISMS EVOLVED

THE ATMOSPHERE TODAY

HUMAN ACTIVITY IS CHANGING THE ATMOSPHERE

5 MAIN POLLUTANTS

WHERE DO THE POLLUTANTS COME FROM?

DIRECT HARM FROM POLLUTANTS

INDIRECT HARM FROM POLLUTANTS

FOSSIL FUELS

COAL IS NOT A HYDROCARBON!

BURNING FUELS IS AN EXAMPLE OF OXIDATION
- COMBUSTION

BURNING FUELS AND COMBUSTION

BURNING FUELS CONTINUED...
Combustion is an example of an oxidation reaction

AIR POLLUTION - CARBON

COMPLETE AND INCOMPLETE COMBUSTION

AIR POLLUTION - SULPHUR

SULPHUR AND HOW IT POLLUTES

ACID RAIN

AIR POLLUTION - NITROGEN

NITROGEN POLLUTION