Plants and trees

The picture below may look familiar to some of you.


Yes, you are right! There are fengshui books which mentioned if a house faces a "negative energy". One of the solutions, is to use tree or plant to divert the "negative energy".

In front of this block of houses is a row of plants. So what is the function of this row of plants?

The function of the plants is to divert the noise from the expressway. In other countries, is common to see wooden or concrete blocks are used to divert noise from roads.