If animal cells contained chlorophyll, how would animal life be different?

Well there would no longer need plants to make air or take Carbon Dioxide, and the Carbon Dioxide would me our main meal

Chlorophyl is what allows plants to undergo photosynthesis, so animals would have a different way of producing food and energy for themselves (through photosynthesis). This would affect their necessity to hunt prey, eat vegetation, and/or other survival needs that are obligatory without chlorophyl. There are a lot of different answers, but a lot of them just rely on creativity and thinking outside of the box.