Riallineamento delle competenze sessione di recupero I Quadrimestre classe IV ITI Testi di...
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Riallineamento delle competenze
sessione di recupero I Quadrimestre classe IV ITI
Testi di riferimentoWhat is global warming? from Slides Pag 104
The Greenest City: London from Slides pag 109 n. 17San Francisco bans plastic shopping bags, from Slides (WB) pag 103
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GREENHOUSE EFFECT
• Greenhouse gases (vapour, water, carbon dioxide and methane) surround the Earth’s surface and part of the atmosphere = they trap heat naturally.
• Greenhouse gases let in light BUT they prevent heat from escaping…
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Greenhouse gases
• They are like the glass walls of a greenhouse
It is called the 'Greenhouse Effect', because it works the same way as a greenhouse. The windows of a greenhouse play the same role as the gases in the atmosphere, keeping some of the heat inside the greenhouse.
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Global warming refers to an average increase in the Earth's temperature, which in turn causes changes in climate.
There are several greenhouse gases responsible for warming
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Humans produce and emit greenhouse gases
• Burning of fossil fuels (coal, oil and natural gas) releases carbon dioxide in the atmosphere
• Electricity production
• But the most warming is CARBON DIOXIDE
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• Because there are more and more greenhouse gases in the atmosphere, more heat is trapped which makes the Earth warmer. This is known as
GLOBAL WARMING.
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problems
• Changing the climate faster (living things may have difficulties to adapt to the new climate)
• In the past this climate change was slower but NOW IT IS FASTER
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The effects
Climate change• More extreme weather (storms, more rain or
drier period)
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The effects
Ice melting
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The effect
• Sea levels (Ice melting in the Antarctic and Greenland will flow into the sea)
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The Greenest City: London from Slides pag 109 n. 17
• Interview between a journalist and the (former) Mayor of London, Ken Livingstone
Ken Livingstone and Boris Johnson (since 2008)
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His agenda
• Climate change is on top of his agenda because it will impact on every aspect of life
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Plans to make London the greenest city
• To launch / create a Climate Change Agency
• Cut the carbon dioxide emissions• Firms should install renewable energy
products• Great use of solar panels and wind turbines
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Individual Londoners should
change the way they live, such as
• Build their homes paying attention to the energy saving products
• Use greener energy• Save energy
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San Francisco bans plastic shopping bags, from Slides (WB) pag 103
• The first city to ban plastic bags from shops, such as supermarket, chemist’s, …
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BILL
• Obliges business owners to use biodegradable bags made up from corn and stop using plastic bags made from oil products
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Drawbacks of plastic bags
• San Francisco produces about 180 million plastic bags each year
• Hard to recycle• Choke animals and birds• Blow into trees and waterway • Take up large amounts of space in landfills
•
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Concerns and worries
• Supermarket may use paper bags requiring more trees to be cut down
• Biodegradable bags are more expensive
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• Reusable Canvas bags are the greenest to use for the shopping