The significance of environmental policies in sustainability lies in their ability to regulate human activities that impact natural resources and ecosystems. These policies aim to promote practices such as waste reduction, renewable energy usage, and the protection of biodiversity. They help to ensure that resources are used efficiently and equitably, fostering both economic growth and environmental health. Strong environmental policies can mitigate issues related to climate change, pollution, and habitat destruction, ultimately contributing to a sustainable future for both people and the planet.