As this website is in English it would may be better to search environmental sites that are written in Hindi.
From there you can distil the information you require and write your essay.
I can provide you with a concise essay on the environment in Hindi. Would you like me to do that?
Zoo animals essay in Hindi
You can find essays in Hindi on different essay sites on internet. To find essay in Hindi , search it on a search engine.
essay on zoo in hindi
details about dog in hindi \
'paradheen sapnehun sukh nahin' essay in hindi
no
bakit may envinment
short notes on paropakar in hindi
on your head
manu deo
in wikipedia