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The ozone layer does two thing primarily first it reflex's the suns uv rays off of earth and because of this the O3 that gets hit with the rays breaks up and connects with other atoms to form a livable atmosphere
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A windmill generates electricity by the use of motion....when wind pushes the blades a shaft rotates inside an alternator which builds up friction which is then regulated to electrical current and can be used in whatever ways are needed depending on the size of the windmill tells you how much electrical current can be produced
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If the puppies are dead or do not move a lot or make noise the male and female dog will try to eat them because they are a food source...if the puppies are not related to the male dog it will be aggressive to the puppies.
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There is about 29% of visible land to 61% or water. On earth ...if you want to be a smart ass to your teacher or whatever you can say that there is a 100% of land on earth which is 61% covered by water...without land there would be no place for the water to be..lol