This
 scheme illustrates the negative effect of tourists visiting the countryside on the environment.
   The most impactful negative effect of visitors that are walking in the countryside is trampling,they are damaging the grass that becomes flattened under their feet in the area.
   First of all the Linking Words
vegetation
 is affected,because,as tourists step on the ground,they are Use synonyms
also
 stepping on plants and Linking Words
vegetation
 tends to become weaker.When Use synonyms
an
 Change the article
a
full grown
 adult presses Add a hyphen
full-grown
with 
his footChange preposition
apply
 a 
plant,it loses the ability to reproduce and grow Change preposition
on  a 
further
.Linking Words
This
 results Linking Words
into
 reduced Change preposition
in
vegetation
 and after that erosion,Use synonyms
decreased
 quality of soil and nature.
    Second of all,by trampling,Correct word choice
 and decreased
soil
 is compacted and becomes hard underfoot.Add an article
 the soil
Linking Words
Consequently
 the air and water quality is reduced and plants do not reproduce,grow and Add a comma
,Consequently
also
 Linking Words
this
 increases the possibility of erosion that later results in reduced Linking Words
vegetation
.By adding all of Use synonyms
this
 up,we get a decreased quality of soil and a worse type of life.Linking Words