Environmental factors during the launching time​

polluted is the answer for this

The citation for a bibliography format is the following:

Author's last name, initial(s). Date published. Title of source. Location of 
     publisher: publisher. Retrieved from URL (if necessary)
 
Example:

 Feist, G. J., & Rosenberg, E. L. (2019). Psychology: Perspectives and 
     Connections. New York, NY: McGraw-Hill Education.

In-text citation would be (Feist & Rosenberg, 2019).