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What is hay fever? Detailed answer

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What is hay fever?

If you do not suffer from hay fever, then the behavior of some people may seem incomprehensible to you. You live in the same conditions, side by side, breathe the same air, but you feel great, and someone constantly sneezes and suffers a lot.

Hay fever is a form of allergy. It belongs to a group of diseases including hives, asthma and certain skin diseases associated with protein sensitivity.

What does this mean? Protein is found not only in food, but also in plant pollen. At certain times of the year, when many types of grasses, such as ragweed, are in bloom, a large amount of pollen is in the air.

It gets into the mouth, nose, eyes of a person. If he does not suffer from protein sensitivity, then nothing happens. But if this is not the case, then the pollen affects certain muscles and tissues, causing a very unpleasant reaction.

All causes of hay fever attacks are known. Some patients are helped by the injection of pollen or protein preparations that increase immunity. Others prefer to simply live in those parts of the country where there is no pollen harmful to them.

Author: Likum A.

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The world is facing a shortage of helium 21.09.2019

If from time to time you happen to buy helium-filled balloons for children's birthdays, you probably noticed that recently they have almost doubled in price. And the point here is not in the growth of the high cost of life and not in balloons, but in helium. There is a shortage of this inert gas in the world, and today many scientists believe that its use to fill balloons and advertising airships is an unaffordable luxury.

Let's start in order. Helium is an inert gas that has no color, no taste, no smell, and is much lighter than air, which makes it suitable for filling balloons. Helium does not linger in the earth's atmosphere and does not have its own deposits - it is extracted either as a by-product from natural gas, or is extracted from the extraction of other minerals. Until recently, helium was mined mainly at three large sites: one in Qatar and two in the USA (in Wyoming and Texas). These three sources provided about 75 percent of the world's helium production. In fact, the US has been the world's largest supplier of helium for decades, but that has now changed as US helium supplies are critically depleted.

Over the past 15 years, the price of helium has increased by 500 percent, and in January of this year, scientists suggested that in 10 years this gas will not remain on Earth at all. Back in 2013, a law was passed according to which the US would leave the international helium market. At the last auction organized by the US authorities in September last year, where quotas for helium supplies in 2019 were sold, the price of this gas increased by 135 percent year-on-year. There is a possibility that this was the last auction when helium was sold to private companies.

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