Sorry I've missed something.

I would rather say: the environment is in a better position. I have never heard of: to have a good position.

The end of the paper age

The manual letters, books, encyclopedias are disappearing. Which What is the cause of the end of paper age? The main cause is the new technology. The laptops, the tablets control our lifes lives. This has both a positive and negative effects.

Use the present continuous to describe a process that is happening right now.

What = Qué, Which = cual

singular: life - plural: lives (like knife and knives)

I add both to improve the style

In On the one hand, the effects on to the paper´s industryies are very negative. As a result because of decreasing production. Perhaps in the future the companies in the paper´s industryies will close shut down. On the other hand, the environment have a good position in this war, because it is not necessary to cut any more trees to produce paper.

On the one hand... on the other hand

Paper industry, not paper industries since there is only one such industry. You can talk about the companies in the paper industry though

Perhaps we are in the a new, more sustainable development age. And But what about the new material resources to build the new technology? The problem only has only been movedshifted.

The adverb is placed between the auxiliary and the past participle.

The End of the Paper Age

The Manual letters, books, encyclopedias are have disappeared. Which Is the this cause of the end of the paper age?The main cause is the emergence of new technology. The Laptops and  the tablets control our lifes lives; this has a both positive and negative effects.

On one hand, the effects to of paper  industries are very negative. As a result, production has decreased. of decreasing production. Perhaps, in the future, the paper industries will (suggestion: go out of business)close. On the other hand, the environment have has a good position in this war because it is not necessary to cut more trees to produce paper.
Perhaps, we are in the a new sustainable development age. And the new material resources to build the new technology? The problem only has been moved. The resources are used to develop new technologies, but the problem has not been solved. 

The end of the paper age

The manual letters, books, encyclopedias are disappearing. What is the cause of the end of paper age? The main cause is the new technology. The laptops and the tablets control our lives. This has a positive and negative effect.
On the one hand, the effects to paper´s industries are very negative. As a result of decreasing production. Perhaps in the future the paper industries will close. On the other hand, the enviroment has a good position in this war, because it is not necessary to cut more trees to produce paper.
Perhaps we are in the new sustainable development age. And the new material resources to build the new technology? The problem only has been moved.