1. Environmental Chemistry
28/11/2018
Environmental Chemistry
W Richards
The Weald School

2. Words – animals, moss peat, rock, calcium carbonate, water
Soil
28/11/2018
Most of the Earth is covered by a layer of soil. What is soil made of?
1) Small fragments of ____
2) Living and dead vegetation
3) _____
4) Dead ______
Some plants prefer acidic soil and some prefer alkaline soil. To make soil more alkaline ______ _____ can be added. To make it more acidic ___ ____ is used.
Words – animals, moss peat, rock, calcium carbonate, water

3. Sulphur dioxide + water sulphurous acid
Acid Rain
28/11/2018
Acid rain damages trees and buildings and can harm wildlife. What causes it?
Sulphur dioxide from volcanoes
Carbon dioxide and sulphur dioxide from power stations
Oxides of nitrogen S O H
Sulphur dioxide water sulphurous acid

4. Air pollution
28/11/2018
As well as acid rain, air can be polluted by dust, pollen, compounds of lead and carbon monoxide. Nearly all of this pollution is man made, so how can we stop it?
Develop more efficient engines
“Wash” waste gases to remove dust and particles
Ways of reducing pollution
Use low sulphur petrol
Use lead-free petrol
Use catalytic converters in cars

5. Global Warming
28/11/2018
Facts:
The 10 warmest years of the last century have all occurred within the last 15 years
Sea level has risen by between 12 and 24cm in the last 100 years
Rainfall has risen by 1%

6. The Greenhouse Effect 1) Heat and light energy reach us from the sun…
28/11/2018
1) Heat and light energy reach us from the sun…
3) …some of the heat escapes back into space…
4) …while some of it is reflected back to the Earth – this is called The Greenhouse Effect
2) …a lot of this heat is reflected off the Earth’s surface…

7. Upsetting the balance
28/11/2018
Until recently, the environment has maintained a balance in carbon dioxide:
Carbon dioxide is produced by respiration…
…and used by photosynthesis
Unfortunately, this balance is being upset by two main factors:
Excessive burning of fossil fuels…
…is producing too much carbon dioxide
Large scale deforestation…
…is slowing down the removal of carbon dioxide from the atmosphere