Topic 8 Flashcards
Ozone
A colourless unstable toxic gas
What does the Ozone layer do
Protects us by filtering out harmful UV rays
Ozone Depletion
Recent phenomenon
What happens as the ozone becomes more depleted
More incoming UV rays will enter earth
What can extended exposure to UV Rays cause
Skin Cancer
Cataracts
Who is at risk of devloping skin cancer
Someone who lives in a warm country
Works outside
What country has the lowest rate of skin cancer
Gambia
0.10/100,000 people have skin cancer
Mainly people of a black ethnicity
What country has the highest rate of skin cancer
Australia
300/100,000 people have skin cancer
Warm country
Exposed to UV rays
Why does Australia have high rates
Predom white people - 20 million European Australians
Tropical Latitude
High level UVR
Cultural emphasis on outdoor activities
How many australians will be diagnosed with skin cancer by the age of 70
2/3
How many australians die of skin cancer every year
2,000
How much more likely is a person to devlop skin cancer than any other form of cancer in Australia
4 x
How much does skin cancer cost the Australian healthcare
AUS $ 1.7 BILLION
Form of adaptation to reduce risk of skin cancer
Wear a hat as part of a school uniform
Make sure to take breaks in the shade
Wear sunscreen
Cover parts of your skin
‘SLIP, SLAP, SLOP CAMPAIGN’
What will happen to skin cancer in 2060 globally
Rates of skin cancer will increase and more cases will appear globally
When were CFCs banned and phased out
Banned - 1987
Phased Out - 2010
Since its peak in 2000 what has happened to the ozone hole
It has got smaller
Why will skin cancer cases increase from 2020-2060
Older people more likely to develop skin cancer as it develops over time
What are the lading causes of global blindness caused by
Cigarettes
Diabetes
Exposure to UV Radiation
Smoke from burning fuelwood
What are cataracts
Form of eye damage - a loss in transparceny in the lens of the eye - can lead to cloudy vision
Positive impacts of climate change on health
Fewer winter deaths in temperate climates
Who are cataracts most common in
Older people
Where are the blindness rates highest and lowest
Highest in LIC
Lowest in HIC
Surgery rates opposite to this
What can happen to cataracts if left untreated
Cause Blindess
How many people turn blind due to cataracts
15 million people worldwide
20% of this is due to UV raditaion
Where do cataracts most affect people
Africa, Middle East, South America
Where is UV radiation the highest
In the tropics
At bigher altitudes
Prevent cataracts
Wear good quality sunglasses - expensive
Treatement - remove the cloudy lens replaced with a clear plastic lens implant. Have to be awake during the surgery
What happened in 1987 to ban CFCs
Montreal protocol - banned CFCs - Unitl 2010 to fully implement
