Whilst many
 think that the loss of types of animals and plants is the main environmental issue. I believe that there are more crucial problems for the environment. 
On the one hand, the loss of species of animals and plants is an important issue for the environment. Correct word choice
Many
During
 the decades, a myriad of types of trees and animals Change preposition
Over
are
 Verb problem
have
disappearing
 from the ground because of global warming and people. Wrong verb form
disappeared
This
 can Linking Words
leads
 to serious Change the verb form
lead
issues
 Use synonyms
such
 as food shortages in the future, and deterioration in the health of the population on the planet. Linking Words
For example
, by the research of the UN in the Linking Words
last
 years numerous pets died out, Linking Words
hence
 now only 40 species of pets are used in agriculture for meat.  It means that in the near Linking Words
future
 it can induce a reduction in food. 
Add a comma
future,
On the other hand
, they are more another more essential amplified Linking Words
issues
 which can not wait. Now scientists from all over the world are trying to find a way out from global warming, Use synonyms
greenhouse
 effect and ocean pollution. Correct article usage
the greenhouse
Issues
 Use synonyms
such
 as these are causing individuals, so they are Linking Words
on
 the top of the list of ecological Change preposition
at
issues
. Use synonyms
For instance
, Linking Words
by
 the report of climatologist Justin Mankin, big countries Change preposition
according to
such
 as Saudi Arabia and Mauretania suffer from severe drought owing to global warming.
In conclusion, Linking Words
although
 there is a huge problem in biodiversity, there are ample Linking Words
of 
more main habitat problems in our time. In my point of view, nowadays global warming and water shortage are the main problems more than biodiversity which can wait.Change preposition
apply