🗊Презентация Light pollution

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Light pollution, слайд №1Light pollution, слайд №2Light pollution, слайд №3Light pollution, слайд №4Light pollution, слайд №5Light pollution, слайд №6Light pollution, слайд №7Light pollution, слайд №8
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Вы можете ознакомиться и скачать презентацию на тему Light pollution. Доклад-сообщение содержит 8 слайдов. Презентации для любого класса можно скачать бесплатно. Если материал и наш сайт презентаций Mypresentation Вам понравились – поделитесь им с друзьями с помощью социальных кнопок и добавьте в закладки в своем браузере.

Слайды и текст этой презентации

Слайд 1


Light pollution, слайд №1
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Слайд 2


What is light pollution?
Описание слайда:
What is light pollution?

Слайд 3


How do we get electricity? We get electricity through large power plants. Power plants have generators. Usually the source is steam. And to heat water, coal, oil, natural gas or nuclear fuel are used. The vapor that forms when water is heated drives the huge turbine blades and those in turn drive a generator.
Описание слайда:
How do we get electricity? We get electricity through large power plants. Power plants have generators. Usually the source is steam. And to heat water, coal, oil, natural gas or nuclear fuel are used. The vapor that forms when water is heated drives the huge turbine blades and those in turn drive a generator.

Слайд 4


How dangerous is burning coal for living beings? In the process of burning coal and crude oil sulfur dioxide is emitted. This toxin is dangerous to humans and causes lung problems.
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How dangerous is burning coal for living beings? In the process of burning coal and crude oil sulfur dioxide is emitted. This toxin is dangerous to humans and causes lung problems.

Слайд 5


What are the dangers of light pollution for people? Reduces the production of melatonin. This hormone is synthesized at night. It regulates the cycles of sleep and wakefulness. It also prevents the formation of cancer cells.
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What are the dangers of light pollution for people? Reduces the production of melatonin. This hormone is synthesized at night. It regulates the cycles of sleep and wakefulness. It also prevents the formation of cancer cells.

Слайд 6


What are the dangers of light pollution for animals, fish and insects? Animals stray from migration routes. Disturbed reproduction cycles. One glowing billboard kills 300000 insects. The oxygen depletion. Water reservoirs become lifeless.
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What are the dangers of light pollution for animals, fish and insects? Animals stray from migration routes. Disturbed reproduction cycles. One glowing billboard kills 300000 insects. The oxygen depletion. Water reservoirs become lifeless.

Слайд 7


What are the dangers of light pollution for plants? Light pollution affects photosynthesis of plants. The leaf fall starts earlier. Cold resistance is reduced.
Описание слайда:
What are the dangers of light pollution for plants? Light pollution affects photosynthesis of plants. The leaf fall starts earlier. Cold resistance is reduced.

Слайд 8


Quiz How many thousands of insects does one billboard kill? Right answer: 300000 insects How does light pollution affect people? Right answer: Melatonin production decreases What are the main sources of light pollution? Right answer: Big cities and factories
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Quiz How many thousands of insects does one billboard kill? Right answer: 300000 insects How does light pollution affect people? Right answer: Melatonin production decreases What are the main sources of light pollution? Right answer: Big cities and factories

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