[en] My new proposal was summarised below for the protection of environment based on the understanding that we can exist on earth only in the balance of nature. We must follow the providence of nature and attain the golden mean in nature. For justification and optimisation, any concrete idea has not been provided, but one of the approaches was shown in the present paper. We have to abandon anthropocentrism and change our sense of value and moral standards with the respect for nature. For practice, the dose limit at the boundary of facilities could be derived from the regional difference of dose rates in the world as an acceptable level to nature. The dose rate would be around 1 mGy per year. Release limit for radionuclides could be defined separately to natural and artificial nuclides. For natural radionuclides, normal ambient concentration can be used for the limit. For artificial radionuclides, the limit might be based on the derived dose rate taking into account the accumulation. For intervention, an analogical approach to natural disasters could be applied. When the situation is easy to recover, then it should be restored. In case it is not easy, then the damage should be confined not to spread outside. For potential exposure, two approaches are suggested for prevention and mitigation. Renewal system is proposed for prevention and decentralization for mitigation. A rigid number for the dose limit is shown in the present paper, as well as renewal or relocation for the radiation protection for environment. However, it is not necessary to take them as they are. For the practical application, definitely it requires some modification. Therefore, present suggestions should be taken as some hint for the establishment of radiation protection system for environment. Especially the suggested dose limit of 1 mGy per year should be taken as the lowest limit for the acceptable level to nature. (author)