Find the underlined part that needs correction in each of the following questions

13. We're going for a bike ride this weekend unless it doesn't rain. (The underlined part should be "unless it doesn't rain" as it creates a double negative. It should be corrected to "unless it rains.")
14. The Mount Everest is the highest mountain in the world. (No correction needed.)
15. Climate change is affecting an Atlantic Ocean at an alarming rate. (The underlined part should be "an Atlantic Ocean" as it should be "the Atlantic Ocean.")
16. After the ice caps will melt, the weather will get much worse. (The underlined part should be "After the ice caps melt" as the future tense "will" is not necessary in this sentence.)