In  beginning of human history,   people could only use direct verbal speech to exchange information. but this  way of communication had many shortcomings. it was not useful, for instance, when one wanted to speak to someone far away. so distance was  problem. and the spoken word could not be kept secret easily. so people wanted to invent  new method of communication.вставьте вместо пропусков артикли. ​

Ійська in africa, a lot of tigers and lions. elephants like bananas monkeys are funny animals cats know how to swim? my cat is very beautiful: her bright green eyes and red thick coat. do you love dogs? - yes. i love big dogs. your parents work on saturdays? - no. on saturdays, we sometimes go with the whole family in the park. your friend is a good swimmer? -yes. he lives in samara. it floats in the volga. look! what is there on the tree? -big beautiful bird. your brother loves cats? -no. he loves computer. that's his hobby giraffes live in russia? - yes, at the zoo.

some people say that nowadays the problem of ecology is becoming more and more vital. but others consider that it is not important for people with modern technologies. and who is right? i am for the former point o view, and now i will try to explain why. 

   

firstly, there are a lot of big cities in the world such as new york, tokyo, beijing, and moscow. these cities pollute a lot. there are some kinds of pollution: water pollution, air pollution, and nuclear pollution. we breathe dirty air, drink dirty water, and eat dirty fruits and vegetables. so it harms our health. secondly, there are a lot of nuclear stations all over the world such as chernobyl or fukushima, which became dangerous objects because of radiation.people who worked at these stations were not careful. so these stations are destroyed now. they are polluting a big territory. thirdly, our world needs much fuel for various machines, technologies, various branches of science and everyday life. and the extraction of minerals harms nature and changes the landscape around the place of extraction.but some people think that nowadays we have a lot of brands – new technologies that will help us in future. they say  that these technologies will help us with hunger, unemployment, dangerous kinds of diseases such as plague and cancer. with the help of nanotechnologies people will get new materials, which can be useful for the army, medicine, science. with a great technological progress the humanity will conquer space. all in all, people will defeat death.i absolutely disagree with these people. of course, it would be a great success for humanity. but these «dreams» need a lot of recourses which are not endless. and it is a long process to invent all these things and spread them all over the world.in conclusion, i would like to stress that our world is very fragile, and we should take care of it because we are a part of this world. without beautiful nature, useful plants, and animals humanity will die out. don’t you agree with me?