Why did Bane wear that breath mask in 'The Dark Knight Rises'?

Who is on the front of the nickel? What did the epilogue of red scarf girl explain? The trees groaned and shook their heads in the wind? What is another term for leather wine holder? What does to contemplate is to toil to think is to do mean? How many legs does the Hound have in Fahrenheit 451? Why did brad go to rehabilitation Perks of being a wallflower? Which family is the centre of interest in Dickens Christmas Carol? What ways does the author create a frightening introduction? What was written in Roanoke? Is imtiaz dharker a girl or boy? What is the meaning of common sense is not so common by Voltaire? What is the parody of the poem 'My Mother' by Ann Taylor? What is a person that reports the news called? What are examples of choral recitation pieces? What motivated the father to call his young son back to meet the cabuliwallah? The technique of setting words to music that represents their meaning is called what? Where can a young woman learn about sex when she feels ready to lose her virginity? What is the main message of the poem from the powwow and the end of the world? Who is Karl Marx and how did he become well known?

Why did Bane wear that breath mask in 'The Dark Knight Rises'?