Определить к какой части речи относятся следующие слова :

Inflation, denominate, equipment, customer, transaction, informal, everyone, twentieth, fifteen, systematic, correctly, commercial, variable, purify, multiply, charged, classify,
taxation, application, recently, useless, unemployment, second, countable, lengthen, illegal, economize, useful

In my home town there are a lot of ecological problems.  The people have many cars so the air in the area is quite polluted.  There is a small river in town and some people take water from this river to wash their cars.  So they return dirty water to the river.   That is why the river is not safe to swim in. Also there are not enough rubbish containers in our town.  That is why a lot of rubbish can be found in the streets and in the parks.  Some people also throw rubbish where they want.  We also have a factory near our town.  The factory has big pipes from which dark clouds come.  I think they also make air worse in my town. In addition to all this I think we have too few parks and green lawns. To make things worse, some people cut trees to make fires when they cook food in the open air.

1. My favourite sport is Nordic Walking.
2. I think I am very good at it.
3. I like Nordic Walking; because I can always be outside and it is easy to do; without any effort.
4. I go walking nearly every day. Only when it is raining cats and dogs and without ceasing; I don`t do it. Sometimes I go walking for one hour or two. It depends on the time I can spend for it. 
5. I started to walk since I can remember; very early. My parents took me for the walk. Later I went walking together with my best girl friend: we also took our dog; a German shepherd , for the walk. 
6. Today my coach is not only my own desire; but also my job. I carry out newspapers in the morning. So I have to be in good condition. If there is something, from what I can learn; it is to have persistancy and discipline . Otherwise I could not probably do it. I hope I will keep my body in good condition ; even when I am getting old.