Effect of diet nutrients density on performance and egg quality of laying hens during the postpeak production phase of the first laying cycle under subtropical climate,

To prepare for the urban development of 2.5 billion people by 2050, the development of low-carbon, resilient, and liveable urban settlements is crucial. Not only do metropolises contribute to global climate change by rapidly emitting and increasing emissions but they themselves are very fragile and vulnerable to these changes. The purpose of this study is to optimize a model for the development of renewable energies in Tehran City and its application in different sectors to achieve sustainability. The research method is according to the type of the applied-developmental study. Information is based on documentation and field methods. Data were collected using a questionnaire from 76 experts and analysed using MICMAC software. The results indicate the fact that the use of public and specific stimuli and incentives for electricity producers to use renewable energy will accelerate the development of renewable energy at the urban level. In order to improve the existing situation, the unsustainable model can be offered to change the situation in favour of the use of new energy at the regional level. Based on the research results, in general, patterns of deployment and development of renewable energies are grouped into five main groups: the use of financial instruments, the use of legal instruments, the development of technology, education and awareness-raising that urban sustainability in the energy sector can be considered based on these four pillars.