Avocados are indeed great for our health and really delicious! But it seems that the production of Avocados does have a dark side to it.
http://www.independent.co.uk/news/world/why-you-should-stop-eating-avocados-immediately-mexico-environmental-damage-chemicals-a7397001.html
Read the news in that link. Sad that such thing is happening. They should not use chemicals on it.