Regardless of the global scope or the actual situation in China, human civilization has developed to such a stage, that is, to protect the ecological environment, ensure the harmony between man and nature, and ensure that the economy can be sustainable. You can exit from this:. ['if the economy is not sustainable, it is not doing a good job in environmental protection.', 'Only by doing a good job in environmental protection can we achieve sustainable economic development.', 'even if environmental protection is not done well, economic sustainability can be achieved.', 'Environmental protection can only be done well if sustainable economic development is achieved.']