divergent01
16.10.2020 11:36

очень вас умоляю
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Pomogashka2002
28.03.2022 05:25
I would like to tell you about the main ecological problems of our city, my native Tyumen, and our region. They are: littering, air pollution, water pollution, endangered species, destruction of natural resources and others.
People cut down forests, pollute air and water. Water is the liquid of life. Man consists of 70% of water, so using water is necessary to sustain our lives. Earth is a "blue planet", but actually,  the amount of fresh water suitable for drinking, is very limited because of the detrimental impact of human activities. 
Therefore, the problem of drinking water is urgent nowadays.  The main source of pollution is agriculture, industry and household waste, as well as pathogens. Besides, the water absorbs harmful to human health impurities - rust, heavy metals, chlorine in the pipes through which the water enters our apartments.
What can we do? How to make our water clean, how to save it?
We must turn to our government, scientists, all people of our city to call them to do the best for the prevention of pollution of water! Adults must better dispose waste of human life, build treatment facilities.  
And of course, we have to save drinking water, not to let it just flow  into  nowhere. It can be done even by a child. Teach him to close the faucet with drinking water when it is not needed. 
Only together we will save not only our native city od Tyumen but all our planet and live  happily.  We must begin from our houses, streets and make our city clean.
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Ответ:
ttmail95
24.08.2020 23:47

Maya is a Mesoamerican civilization known for its writing, art, architecture, mathematical and astronomical systems. The beginning of its formation is attributed to the pre-classical era (2000 BC - 250 AD), most of the Mayan cities reached their peak in the classical period (250-900 AD). By the time the conquistadors arrived, it was in deep decline. The Mayans built stone cities, many of which were abandoned long before the arrival of Europeans, others were inhabited after. The Mayan calendar was also used by other peoples of Central America. The hieroglyphic writing system was used, partially deciphered. Numerous inscriptions on the monuments have been preserved. They created an effective farming system, had deep knowledge in the field of astronomy. The descendants of the ancient Maya are not only the modern Maya peoples who preserved the language of their ancestors, but also part of the Hispanic population of the southern states of Mexico, Guatemala, Honduras. Some Mayan cities are included in the UNESCO World Heritage List: Palenque, Chichen Itza, Uxmal in Mexico, Tikal and Quirigua in Guatemala, Copan in Honduras, Hoya de Seren in El Salvador.

The cultural history of this people is usually divided into three periods:

The first period (from antiquity to 317) is the time of the emergence of city-states, primitive slash farming, the manufacture of cotton fabrics, etc.

The second period (317-987) - the ancient kingdom, or the classical period - the time of the growth of cities (Palenque, Chichen Itza, Tulum) and at the same time the mysterious exodus of the population from them at the beginning of the 10th century.

The third period (987 - XVI century) - the new kingdom, or the post-classical period - the time of the arrival of the European conquistadors, the adoption of new laws, styles in life and art, the mixing of cultures, fratricidal wars, etc.

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