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Humans and the Environment
Transcript of Humans and the Environment
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 is
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
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
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
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:
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
Using words and labels - draw a diagram explaining the greenhouse effect
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
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
Increased use in recent years
Question 1 page 129
Climatic regions are changing
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
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
Reduce, re-use, recycle
Reducing burning of fossil fuels
Increasing renewable energy
Impact of tourism on these countries
High water supply needed
Agriculture put under pressure
Apart from Leprechauns and their pot of gold
Small solutions that will make a difference
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