In the present age travel has become increasingly popular.
I don't like this first sentence. Just as a Samurai does not want to draw the sword without using it, the writer should not start to type without making sentences that can kill someone with their power. Every sentence, especially the first sentence, should be so interesting that it can kill you! Start each essay with words that can kill with their interestingness. :-)
Capitalize undoubtedly at the start of that second paragraph.
To improve the content, make a strong argument. TO make a strong argument, google this: how to refute the counter-argument
The counter-argument is like this: Tourists destroy cultures by creating pollution, commercialization, and... turning culture into a commodity. Some people argue that travel can destroy understanding among cultures because of the irresponsibility of tourists and the businesses that accommodate them.
Google this: sex tourism
Google this: tourism hurts local culture
See, if you write a paragraph about the counter-argument, you can show how that argument is not as strong as YOUR argument.
:-)