Urban environmental and economic performance linked to sustainability: Evidence from big and medium size Chinese cities

This paper is based on research in Chinese cities. It addresses the issues related to urban environmental performance and sustainability in emerging Chinese cities. The result shows that: (1) To basically control the degradation of urban environment the minimum per capita GDP should be about 1000 USD in China. This amount is only one third of that in the developed world; (2) The average share in GDP necessary for environmental investments is 2.9%. Such an amount would help to avoid further urban environmental degradation in Chinese big cities. 1.7% of GDP would be necessary for medium-sized cities. These environmental investments will have a positive impact on local economic growth and social progress; (3) Cities are in different stages from non-sustainability to sustainability, and the major characteristics of cities in these different stages will be presented in this paper; (4) It is obvious that significant differences in urban environmental management exist in cities that were identified and which are at different stages of urban sustainability

Voluntary agreements to achieve energy efficiency, a comparison between China and The Netherlands

China has gained experience with voluntary agreements. In this paper the experiences in China will be analysed and compared to the factors contributing to the success of this model in the Netherlands. Are voluntary agreements an alternative for the Chinese command and control system? We distinguish different types of voluntary agreements and compare those in China and the Netherlands on a number of dimensions. The hypothesis is tested that voluntary agreements are more effective in achieving pollution control than the traditional command and control approach. It is found that indeed most voluntary agreements score good in China as well as in the Netherlands on a number of chosen indicators. Voluntary agreements are effective in achieving ambitious energy saving targets in a flexible and cost-effective way. Voluntary agreements have the function to mobilise support for energy saving, which is not easily mobilised through the traditional command-and-control approaches. There are however some important differences between the functioning of the system in China and in the Netherlands, where a more bottom-up approach is common. The Netherlands has a tradition of stakeholders' involvement and experience over a longer time of monitoring the effectiveness of the project and adjusting them if necessary

Measuring urban resilience to climate change in three chinese cities

Building an urban resilience index results in developing an increasingly popular tool for monitoring progress towards climate-proof cities. This paper develops an urban resilience index in the context of urban China, which helps planners and policy-makers

A heterozygous moth genome provides insights into herbivory and detoxification

How an insect evolves to become a successful herbivore is of profound biological and practical importance. Herbivores are often adapted to feed on a specific group of evolutionarily and biochemically related host plants1, but the genetic and molecular bases for adaptation to plant defense compounds remain poorly understood2. We report the first whole-genome sequence of a basal lepidopteran species, Plutella xylostella, which contains 18,071 protein-coding and 1,412 unique genes with an expansion of gene families associated with perception and the detoxification of plant defense compounds. A recent expansion of retrotransposons near detoxification-related genes and a wider system used in the metabolism of plant defense compounds are shown to also be involved in the development of insecticide resistance. This work shows the genetic and molecular bases for the evolutionary success of this worldwide herbivore and offers wider insights into insect adaptation to plant feeding, as well as opening avenues for more sustainable pest management.Minsheng You … Simon W Baxter … et al