Переделать предложение из действительного в страдательный залог 1. mike has left his notebook at home 2. he is writing a letter at the moment 3. our group will do a lab work tomorrow 4. we asked questions 5. universities develop new methods of students training

The notebook has been left at home
A letter is being wrtitten at the moment
A lab work will be done tomorrow
Questions were asked by us
New methods of training are developed by universities

Thanks for your letter. It was great to hear from you again. I’m proud that you do a big favor for your family, helping your parents with household chores. Unfortunately, I can’t brag about a long list of family responsibilities, which I do. I usually do easy tasks such as washing the dishes and bringing things. As for shopping, we always go to the mall together at the weekends. It’s the greatest way to spend time with family and enjoy shopping. Besides this, when we have some free time, we go to a café at the center of Rostov, where we spend our time with joy and fun!

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.