You need to answer the question 'Are the given steps in order?', given a set of steps describing a process. Your answer must be either Yes or No. If the answer is No, that means the steps are out of order and do not make sense in the order they are in. If the answer is Yes, that means the steps are in order and make sense in the order that they are in. A set of steps are not in order if the steps reference information that is introduced in a later step

 ['Acid rain is produced by chemicals that reach into the atmosphere', 'Falls onto the ground', 'The acid rain starts scouring rocks', 'Destroys vegetation', 'The lack of vegetation alters the surrounding environment.'] 
  Yes  

 ['The carbon dioxide is removed', 'The lungs bring the oxygen to the rest of the body.', 'And into the bronchial tissue', 'Passes through the lungs', 'Air is brought in through the mouth'] 
  No  

 ['Blood is sent to the liver', 'The liver uses chemicals and proteins to treat the blood', 'The blood is cleaned', 'Energy is produced', 'The blood leaves the liver cleaned.'] 

  Yes