What are the organisms that may harm the environment?

Organisms that may harm the environment include invasive species, which can disrupt local ecosystems by outcompeting native species for resources. Pathogens, such as certain bacteria and fungi, can also devastate plant and animal populations. Additionally, pollutants like plastics and chemicals can harm wildlife and degrade habitats, leading to broader ecological imbalances. Overall, the introduction and spread of harmful organisms can significantly impact biodiversity and ecosystem health.