The latter is the review and summary of the theories related to non - renewable resources . non - renewable resources belong to natural resources , so the analysis on this subject cannot be isolated from the economic analysis on natural resources 在研究中,本文力求站在经济学理论的前沿,运用现代经济学的研究方法,其目的是为合理、有效地利用不可再生资源提供经济学的理论支撑。
Most of the vehicles are running on fossil fuel , e . g . petrol , diesel or gas , which is non - renewable and will be exhausted eventually . fuel combustion also emits carbon oxides and nitrogen oxides , which cause air pollution 现时，大部分汽车都是以化石燃料（例如：汽油、柴油或石油气）开动，而这些燃料都是不可再生的资源，会有耗尽的一天，而它们燃烧时所排放的碳氧化物及氮氧化物，会污染我们的空气。
Historic building and environment is not only the memory of one country , but also the enchantment of certain place . " it is composed of the evidence of human ' s culture , religion and society ' s creativity and diversity " . it is the precious resource that human ca n ' t reproduce 历史建筑及环境不仅是国家和民族集体记忆的载体， “构成了人类文化、宗教和社会的创造性、丰富性、多样性的最确切的见证” ，也是城市特色与魅力的体现，是人类宝贵的不可再生的资源。
Development on ispg can not only fulfill the potential of power supply equipments and reduce wastages of electric power to the aim of saving energy and enhancing economic benefits of enterprises , but also benefit the whole society . it also helps to save resources that are not recyclable , such as coal . moreover , our country can reduce investment to build power plants , and so on 研制智能型静止进相器不仅可以发挥现有供电设备的供电潜力，降低电力损耗，从而达到节能目的，提高企业的经济效益，而且社会效益也十分显著：电机功率因数的提高，降低电力损耗，还有利于节省煤等不可再生资源，减少国家投资新建发电厂等。
Being a super giant soe , dagang oilfield group ltd . co . has made outstanding contribution on resources costruction and development of china by 38 years . but , at the same time , the system of planned economy used for many decades also put a heavy burden on it . because of the non - regeneration of oil , the company s development is limited 大港油田作为特大型国有企业，经过38年的奋战，为我国能源建设和发展做出了突出的贡献，但是几十年的计划经济体制同时也使大港油田背上了沉重的包袱，由于石油资源的不可再生性，企业的发展受到了制约。
These examples help explain why most environmental scientists believe that over the next few decades , the danger of degradation and exhaustion is greatest for potentially renewable resources , not nonrenewable resources ( except for petroleum and perhaps a few scarce minerals for which we can ' t find economically and environmently acceptable substitutes ) 这些例子帮助解释了为什么大部分环境学家相信在今后的数十年内，减少和枯竭是对于潜在可再生资源的最大的威胁，而不是不可再生资源（出了石油或者一些稀有矿因为我们不可能找到既经济又环保的替代品） 。
These examples help explain why most environmental scientists believe that over the next few decades , the danger of degradation and exhaustion is greatest for potentially renewable resources , not nonrenewable resources ( except for petroleum and perhaps a few scarce minerals for which we can ' t find economically and environmently acceptable substitutes ) 这些例子有助于解释为什么大多数环境科学家相信在今后几十年内，可再生资源被退化和枯竭的危险性是最大的，而不是不可再生资源（石油，还有少数几种我们未能找到经济和环保的代替品的稀有矿物除外） 。
These examples help explain why most environmental scientists believe that over the next few decades , the danger of degradation and exhaustion is greatest for potentially renewable resources , not nonrenewable resources ( except for petroleum and perhaps a few scarce minerals for which we can ' t find economically and environmently acceptable substitutes ) 这些例子可以解释为什么大部分环境学家相信在未来的几十年里，退化和资源枯竭是对潜在再生资源的最大危险，而非不可再生（除了这个问题之外，也许我们不能找到一些经济又环保的代替品来代替稀有金属） 。
