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Humans and the Environment

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Miss Cummins

on 27 January 2016

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Transcript of Humans and the Environment

Human activity affects the environment in many ways

Warming of the atmosphere =

Climate determines the way people live

The Greenhouse Effect
Heat comes from ________

Heat energy passes through the _________ as ________ radiation

Global warming
Global warming is
climate change
Global warming is caused by an increase in greenhouse gases

The world's global temp may rise by 1° and 6° in the next century

This is generally due to
human activity
What big change in history might have increased the amount of greenhouse gases ?

Impact of Global Warming
Rise in earth's temp is affecting
climates, sea levels and rainfall

In pairs, write down the impact of the increase in temperature on each on these three concepts (5 mins)
Solutions to Global Warming
In pairs, for two minutes discuss how we could help stop global warming.
Tourism in Ireland
What attracts people to Ireland ?
Tourism in Continental Europe
Humans and the Environment
Miss Cummins
climate change
the sun
How does the Greenhouse Effect work?
Earth's temperature increases

Heat energy is radiated back into the atmosphere as infrared (long-wave) radiation

Gases in the atmosphere trap this energy

These gases are known as
This is known as the
Greenhouse Effect
This process keeps heat inside the atmosphere - stops the earth from being too cold

As a result earth's temp is kept at 15°C
Some greenhouse gases are:
Carbon Dioxide
Nitrous Oxide
As humans emit more CO2 and other gases the greenhouse effect becomes stronger and the temp of earth rises

This causes the earth's climate to change

Greenhouse gases created by humans include
CO2, methane, chlorofluorocarbons and nitrous oxide

These emissions have increased in recent years due to burning of fossil fuels, transportation and land use changes
Carbon Dioxide
Using words and labels - draw a diagram explaining the greenhouse effect
Most common
greenhouse gas
Responsible for almost half of the extra warming that is taking place

5 billion tonnes released into the atmosphere by human activity
How do we release CO2 ?

Burning fossil fuels releases CO2
Examples of fossil fuels?

The carbon is released when they are burned

Coal, gas, oil and timber
Forests and vegetation absorb CO2

Deforestation and forest fires = less absorption of CO2
Produced by bacteria
This bacteria is most productive in waste dumps, swamps, animal dung, paddy fields, guts of cattle

Cattle ranching releases methane gas - they generate the gas while chewing
As countries develop the cattle population increases, as does rice production
Chlorofluorocarbons (CFCs)
Aerosols, refrigerators and foam packaging
Damage the ozone layer

Ozone layer - closest layer of the atmosphere
Protects us from suns rays
Damage = 'hole' in ozone layer

Nitrous Oxide
Increased use in recent years

Question 1 page 129
Climatic regions are changing
Heavier rainfall
Extreme climates
Less predictable
Melting icecaps - rising sea levels
Rise in sea level
Polar ice caps are melting = increase sea level
Some coasts and small islands will disappear
A recent study says we can expect the oceans to rise between 2.5 and 6.5 feet (0.8 and 2 meters) by 2100, enough to swamp many of the cities along the U.S. East Coast. More dire estimates, including a complete meltdown of the Greenland ice sheet, push sea level rise to 23 feet (7 meters), enough to submerge London.

Climate change may help or damage

Increase in temp may provide earlier crops/extra crops

Increase could also dry soils and increase the need for water

Heavy rainfall can fertilise the soil
might wash away farmland
Official policies
The Framework Convention on Climate Change (1992)
Kyoto Protocol (1997)
Planners and engineers are constantly looking for ways to reduce global warming
Energy conservation policies are also becoming high priority
Cleaner fuel
Reduce, re-use, recycle
Reducing burning of fossil fuels
Increasing renewable energy
Sporting Activities
Impact of tourism on these countries
High water supply needed
Environmental pollution
More buildings
Agriculture put under pressure
Apart from Leprechauns and their pot of gold
Small solutions that will make a difference
Reduce Reuse
Less heat
and AC
Change lightbulbs - CFL/LED
Drive less and drive smart
Energy Efficient Products
Use Less Hot Water
Use the 'OFF' switch
Plant a tree
Report card from utility company
Encourage others to conserve
But first lets create a revision guide
Creating an information booklet on global warming
Fold into three
Include information such as:
What is the greenhouse effect.
What are greenhouse gases?
What is global warming?
What causes global warming?
How can we stop global warming?

Make it as bright, colourful and artistic as you can !

A prize will be given to the best two next week
Full transcript