Oxygen, the source of our life is produced by the beautiful nature. We hear everyday that we must protect this nature to protect mankind. Yes, that is the truth, plants and trees must be grown as it would keep this world healthy and beautiful. But there are plants that you might not like to come across. They may harm you, can be painful and may even kill you. Here are the ten deadliest and most dangerous plants that you need to be aware of and make sure you never plant them. They can be anywhere in the roads, forests or even in your own garden. Make sure you are long away from them.