Complete the sentences with a subjects or object pronoun

Завершите   предложения с темами   или объектны м местоимением

1. Yes. They realize it only when they trying to work. They realize how difficult to earn money.
2. No. Because all your life is your moral lesson and every day you get new information and work is also a studying.
3. Yes and no. If they have free time they can help their parent or do sm useful. Actually they should studying well, thats their main work
5. Yes. If you don't know what to do on saturday you can do something useful for yourself - for example to find a work for your age.
6. Yes. Of course first of all they should study and if everything is ok only after that they can find a job. But its unreal to do 2 thing at the same time.
7. Yes. Job teaches people how to live or just save your life from sm dangerous.

Environment - a set of components of the environment, natural and man-made natural objects and man-made objects.
Components of the environment - land, minerals, soils, surface and ground water, air, flora, fauna and other organisms, as well as the ozone layer of the atmosphere and near-Earth space, providing a set of favorable conditions for the existence of life on Earth.
Pollution - into the environment of matter and (or) energy, property, location or number of which have a negative impact on the environment.
Contaminant - a substance or mixture of substances, the number and (or) concentrations exceed established for chemical substances, including radioactive and other substances and microorganisms standards and have a negative impact on the environment.
Air pollution - a really serious problem. Air is composed of oxygen, nitrogen, water vapor, and, thanks to our civilization, of a variety of toxic particles. The more of these particles in the air is, the less room is left in the atmosphere for oxygen.
   The problem of air pollution is not limited to the space outside. The air inside our homes and offices can be as dangerous to your health. The main source of pollution - cigarette smoke, but it is not the only one. Toxins are allocated even when you just cook. Every time you scratch the Teflon non-stick coating is allocated enough toxins to kill a canary.
 Greenhouse effect, which we all have been associated with the phenomenon of global warming, caused by toxic gases. The main enemy of clear atmosphere - methane. It is released from the decomposition of sewage.
Greatly affects our waterways. In every neighborhood, in every city there drain sewer, storm water from the highways and municipal enterprises directly into the river. Everything goes into the water, passing minor cleaning steps.