Final answer:
The Phoenix Zoo and the San Diego Zoo audited their waste recycling performance, whereas there is no mention of the Lincoln Park Zoo and the Bronx Zoo doing so.
Step-by-step explanation:
The Phoenix Zoo and the San Diego Zoo are two of the zoos that audited their waste recycling performance. Both zoos have made efforts to minimize waste and increase recycling to reduce their environmental impact. For example, the San Diego Zoo has implemented recycling programs for items such as paper, cardboard, plastic, and aluminum cans.
On the other hand, there is no specific mention of the Lincoln Park Zoo and the Bronx Zoo auditing their waste recycling performance in the provided information.