Unit 19 Global Warming

Heating up the Earth = GLOBAL WARNING?

GH effectA natural phenomenon where gases in Earth’s atmosphere trap heat from the sun to warm the surface and lower atmosphereEnhanced GH effectAccelerated GH effect due to rapid increase in GH gases in the atmosphere, trapping more heat from the sun

.Relationship of Earth & Atmosphere

Relationship of Body & Clothes

The atmosphere is the layer of air around the earth to keep it warm.

Allows the right amount of sun’s heat in, and doesn’t allow too much to escape.

The clothes are the layer around our body to keep us warm

Allows the body to maintain a certain temperature.

Warming of the Earth Warming of the BodyWe are warmed by 1. Body gives out

heat 2. Heat from the

sun 3.Trapped heat

from the clothes

Earth is warmed by :1. Itself – gives out heat2. Heat from sun3. Trapped heat from Greenhouse effect

A natural Greenhouse effect allows the sun’s rays to enter earth and keep the heat inside

Necessary to keep Earth warm and livable.

ENHANCED Greenhouse effect

Extra Warming of the Body

• When you put on a jacket unnecessarily

• More heat being trapped

• Result = Warmer body

When there’s MORE greenhouse gases in atmosphere unnecessarily

Due to industrializationMore heat being trappedResult = Global Warming (hotter earth)

Heat that reaches earth

Heat that are reflected back by earth & atmosphere

Heat is trapped by GH gases

Heat given out from the earth

Greenhouse gases in the atmosphere

Solar radiation from the Sun to Earth

•Glass panels lets in light but keeps heat from escaping.

•So plants can grow with the trapped heat from the sun.

•Glass panels lets in light but keeps heat from escaping.

•So plants can grow with the trapped heat from the sun.

Greenhouse(Cold countries)

•Greenhouse gases in atmosphere = Glass panel

•Traps heat naturally to keep Earth warm and livable

•Greenhouse gases in atmosphere = Glass panel

•Traps heat naturally to keep Earth warm and livable

Yellow layer = Extra Greenhouse Gases / Air pollutantsYellow layer = Extra Greenhouse Gases / Air pollutants

EnhancedGreenhouseEffect

Causes of Greenhouse effect

Source •Respiration

•Burning of fossil fuels & forests

What is the % in the atmosphere? 72%

Greenhouse Gases

Carbon Dioxide

(Highest percentage of greenhouse gas)

Causes of Greenhouse effect

Source •Aerosol spray cans

•Coolant in refrigerators and air-conditioners

What is the % in the atmosphere?13%

Greenhouse Gases

Chlorofluorocarbons (CFC)

Causes of Greenhouse effect

Source •Decomposition of waste

•Livestock eg cattles/goats belch

•Mud, volcanoes

What is the % in the atmosphere? 10%

Greenhouse Gases

Methane

Greenhouse Gases

Nitrous Oxide

Causes of Greenhouse effect

Source •Burning of fuel

•Chemical fertilisers (Which topic did we learn about this?)

Proportion in atmosphere 5%

1. Get into groups of 42. Create a drawing with the following items in it

a. Weatherb. Plantsc. Peopled. Animalse. Sea

WRITE DOWN THE IMPACTS OF GLOBAL WARMING ON EACH OF THEM

Consequences of Global warming

Impact on people

- Diseases

- Dehydration & heat stroke

Consequences of Global Warming

Rising sea levels- Sea water expand- Ice caps melt- Flooding of cities and islands

Changes in weather conditions

- Increased temperature

-Global climate change e.g. more droughts & floods

Impact on plants

Amount of rainfall affects food supply

Impact on animals

Need to migrate to cooler areas for survival

Global issue

E x t ent

Car bon diox ide

CF C

M et hane

N it r ous O x ides

Causes

W eat her

S ea Level

People

Plant s

A nimals

Consequences

I nt er nat ional

N at ional

I ndividual

M easur es

GlobalW ar ming

E nhancedGr eenhouse

E ff ect

Worksheet page 1

1. Fill in the causes of pollution in for (a) to (d)

Refer to text page 136 and 137 to find out more

(a)Agriculture(b)Fire

(c)Industry

(d)Transport

• Ground water – contamination of water supply, affects people, animals and plants

• Human health – Respiratory problems, breathing difficulty eg Asthma, bronchitis

• Cultural resources – Corrosion of surface

• Aquatic ecosystem – Poisoning of animals, lack of oxygen due to algae boom

• Drinking water – Poisoning of people and animals

• Forest productivity – Withered trees, dying plants

• Visibility – How clear/far we can see, affects traffic conditions

Pollution news articlesPollution news articlesPollution news articlesPollution news articlesWhich do you think is the most Which do you think is the most effective method suggested by the effective method suggested by the Indonesia Government to reduce Indonesia Government to reduce forest fires?forest fires?

ExampleExample-Ban open burning + ReasonsBan open burning + Reasons= The burning can be easily detected = The burning can be easily detected by the authorities , and this is by the authorities , and this is especially so in fire prone areas.especially so in fire prone areas.= Hence police can enforce this new = Hence police can enforce this new law and capture the fire setterslaw and capture the fire setters= The offenders will also be aware of = The offenders will also be aware of this new law and think twice before this new law and think twice before their set fires.their set fires.

Name the causes of Acid Rain1. Burning of coal2. Industrial pollutants3. Lightning4. Aerosols

What can YOU do to reduce acid rain?- Not to use aerosol products- Educate others about the causes of acid rain

What is the purpose of the Semakau landfill?

•It is an offshore landfill and also Singapore’s only landfill

•It is part of Singapore’s sustainable solid waste management system

•It also has a wealth of natural habitats

It’s Simpsons’ Time

Important points

• Ice cream melting due to temperature increase

• Earth is full of sun beams, heating up our atmosphere

• How to rid Greenhouse gases?• By dropping a giant ice cube into the

ocean • Since greenhouse gases are building up,

it takes more and more ice to lower the temperature.

http://www.youtube.com/watch?v=zyTm_0D0uS8Learning Video . From “An Inconvenient Truth” – Global Warming cartoon

Solutions to Global warming (Individual level)

Help reduce emission of GHG

1.public transport / cycle / walk2.Car-pooling3.Energy saving light bulb4.Buy CFC free products

Use alternate sources of energypromote vehicles that run on alternative fuel e.g. Hybrid cars in Germany powered by petrol and electric batteries = consume less fuel / release less pollutants

Enforcing laws & regulations- strict laws on amount of pollutants emitted by vehicles, industries, power stations

Solutions to Global warming (National level)

Montreal Protocol•Treaty to limit the production and use of CFCs (signed in 1987)•Signs of ozone depletion slowing down since then

Kyoto Protocol•Treaty for developed countries to reduce emission of GHG •Note that many countries did not accede due to profits from industries and jobs for people

Solutions to Global warming (International level)

Together, we can reduce demand for

meat products and REDUCE METHANE!

So eat LESS

MEAT! More

Veggies…

It’s getting hot in Kranji Pig Farm!

Do you know that Methane is found in food supply and livestock? It contributes to Greenhouse effect which causes GLOBAL WARMING!

Advertisement for Kranji pig farm