How do we pollute our How do we pollute our environment?environment?

List 5 waysList 5 ways

Air pollution – can you think of Air pollution – can you think of any examples?any examples?

Water pollution – can you think Water pollution – can you think of any examples?of any examples?

Land pollution – can you think Land pollution – can you think of any examples?of any examples?

Impact on the Carbon CycleImpact on the Carbon Cycle

• List as many ways that human List as many ways that human activity may disrupt the Carbon Cycleactivity may disrupt the Carbon Cycle

• Use your cycle diagram to help youUse your cycle diagram to help you

• DiscussDiscuss

What are fossil fuels?What are fossil fuels?

• Fossil fuelsFossil fuels are are hydrocarbonshydrocarbons, , primarily primarily coalcoal, , petroleumpetroleum, , fuel oilfuel oil and and gasgas. .

• They formed from the They formed from the fossilisedfossilised remains remains of dead plants and animals by exposure of dead plants and animals by exposure to heat and pressure in the to heat and pressure in the EarthEarth's 's crustcrust over hundreds of millions of yearsover hundreds of millions of years

What’s the problem?What’s the problem?

• The burning of fossil fuels by humans is The burning of fossil fuels by humans is the largest source of emissions of the largest source of emissions of carbon dioxidecarbon dioxide, which is one of the , which is one of the greenhouse gasesgreenhouse gases that contributes to that contributes to global warmingglobal warming. .

• This means that the This means that the surface temperaturesurface temperature of the Earth will rise in response.of the Earth will rise in response.

Fossil FuelsFossil Fuels

What can we do?What can we do?

List at least 5List at least 5

Indicator species:Indicator species:

• Looking at LichensLooking at Lichens

LichensLichens are the crusty organisms that grow in are the crusty organisms that grow in places such as on places such as on rocksrocks and and bricksbricks. .

• You can also find them on You can also find them on gravestonesgravestones and the and the side of side of treestrees. .

• They range in They range in colourcolour from grey-green to orange from grey-green to orange and red. and red.

LichensLichens

• Sulphur dioxide gasSulphur dioxide gas is produced when fuels like coal and oil are is produced when fuels like coal and oil are burned. burned.

• Some lichens are very Some lichens are very sensitivesensitive to air pollution to air pollution

• In areas of low air pollution:In areas of low air pollution:-a large variety of different lichen species-a large variety of different lichen species-lichens tend to be big and fluffy-lichens tend to be big and fluffy

• In areas of high air pollution:In areas of high air pollution:-very limited variety of lichen species-very limited variety of lichen species-lichens tend to be small and crusty-lichens tend to be small and crusty

We can use lichens as an We can use lichens as an indicator speciesindicator species..

Explain what you think an indicator species is!Explain what you think an indicator species is!

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