When talking about recycling, people don't seem to consider the recycling of clothing.
The comma should be placed between the first use of recycling and people. The subordinate clause is "when talking about recycling". This is a clause because of the word "when". When makes the reader wonder when what? The main clause is "people don't seem to consider the recycling of clothing."
Explanation:
Bat:A nocturnal mammal capable of making flights; an implement with handle and solid surface used to it balls
D I’m not sure though so if it’s something important I wouldn’t put that