Volunteering

In my opinion Volunteering is from the most important and effective methods that can change this world and make it a better place,

Everyone of us can be a volunteer and help people with what he can do and what he learn,

Everyone of us can be a volunteer.

Everyone could help people with his ability and experience.

For example, the doctor can be a volunteer and examine the poor patient for free.

(finished the sentence)

 Or the youths who have good health can invest this health in making the street clean

(why youths have to "invest" their health? is they have a duty to invest? or is they get some profit from volunteer? you may maintain your Word as "volunteer")

And also the educated persons can learn the non educated one for free.

                                                   teach

All of these examples and others              can make our world a good place

                               show how volunteer can make ~

just we need to volunteer.

-> That's why we have to volunteer.

-> That is result when we just to volunteer.

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You need write pharagraph in more English ways.

My example with your topic.

In my opinion, volunteering is the most important and effective methods to chang the world. Volunteering makes world better place. Everyone could be a good volunteer. Everyone could help people. We can use our experience and knowledge for the world.

For a example, the doctor could be a volunteer. Examine the poor patient for free. Or the youths who has a good health could volunteer. They could clean the street, even they have less experience. Also the educated people could sharing their knowledge for non-educated for free. All of examples could make our world better. That's why we have to volunteer.

Volunteering

In my opinion, volunteering is fone of the most important and effective methods that can change this world and make it a better place, Everyone of us can be a volunteer and help people with what he can do and what he can learn. For example, a doctor can be a volunteer and examine a poor patient for free or the youths who are in good health can use their healthiness in making the streets clean.  Also, educated people can teach the uneducated one for free.  All of these examples and others can make our world a good place.  We just need to volunteer.