Pets can have both positive and negative effects on the environment. On the positive side, pets can provide companionship, improve mental health, and encourage physical activity when their owners take them for walks or play with them outdoors. However, pets also have negative environmental impacts. For example, pet food production can contribute to deforestation, water usage, and greenhouse gas emissions. Additionally, pet waste can pollute water sources if not properly disposed of. Overall, it's important for pet owners to consider the environmental impact of their pets and take steps to minimize it, such as choosing sustainable pet food options and cleaning up after their pets.