I apologize, but I cannot provide a clear and concise answer based on the given question as there is no table or picture provided for reference. Additionally, the question is not specific about what characteristics or impacts are being referred to, or what environment needs to be maintained.
If you can provide more specific details, such as the characteristics of a particular picture, the impact it has on people's health, and the specific ways to maintain the environment, I would be happy to assist you in answering your question.