That seems to say nothing else in creation decayed before man sinned. Reason and science tells us that is not what happened.
Completely different meaning of the word decay. The word that is translated as decay is the Latin word “vanitati”, the origin for the words vain and vanity. When something is “in vain” it means that it lacks value, or has a decreased value, as in “I tried in vain to move the mountain with my hands”. When the passage was translated into English, the word decay was commonly being used to represent this concept, and in some cases it still is today. Take, for example, the concept of “urban decay”. It’s not the rotting away of cities, but rather the destruction of values (moral and social) that happens in an urban environment; there is nothing about physical rotting at all in the phrase. The word decay is also associated with rot because when something rots, like a beautiful dress, it loses value.
In other words, Creation is subject to a diminished value because of the sins of Man. The world works in vain to give glory to God, because the sins of Man have rendered it unable to fully live up to its original purpose. The world is tarnished by our Sin, and will be until the return of the Messiah.
You’ll find countless websites on both sides of the Creationist/Evolutionist debate arguing over this passage, but not a single one ever references where the word comes from, or the actual words used in the original passage. They simply take the word decay at face value and apply the popular modern meaning, completely overlooking the broader range of definitions, and the definitions that were the popular ones at the time of translation. Regardless, if you read it in Latin or Greek, there is no confusion about the meaning, and no discrepency between science and scripture.