Grass-roots emergency service is an important content of emergency management. Its service level directly affects the people’s sense of security, sense of gain and happiness. Based on the related theories of agile governance and collaborative governance, draws on the excellent research results at home and abroad, this paper establishes the operation mechanism of the grassroots emergency service, adopts the method of semi-structured interview code, analyzes the interview content, and discusses the emergency service of the grassroots government of Jishishan County. Then, this paper puts forward the emergency service improvement strategies of updating the service concept, combining agile governance with collaborative governance, embedding data in the governance process, and cultivating and improving the agile governance ability.

Mountains formed by tectonic movement are called tectonic mountains. Tectonic mountains are formed because of the crustal movement, which causes a large area of the surface rock layer to fold, or the fault block mountains formed because of the crust rupture and rise. For example, the Himalayas and Taihang Mountains in Asia and the Andes Mountains in South America were formed by tectonic plate movement and compression. Originally a plateau or structural mountain, and later by the long-term erosion of external forces such as water, wind and other mountains, called erosion mountains. The water erodes the mountain into voids, and when the voids collapse, they are washed into valleys by the water, forming mountains. Mountains formed by the accumulation of certain materials on the surface of the earth are called accumulation mountains. These mountains are symmetrical in shape and generally stand in isolation on low ground. For example, volcanoes everywhere are the most common accumulation mountains.

The tropical forest productivity is limited by P. Casuarina equisetifolia has been widely established along nutrient-impoverished coasts and plays a role in resisting wind and erosion. To assess how phosphorus may affect the growth of coastal shelter plantations, we conducted a P gradient experiment in a young C. equisetifolia plantation with three treatments: 100 kg P ha-1 addition (P100), 50 kg P ha-1 addition (P50), and controls (CK). We measured soil properties and plant growth. Plant growth were not affected by the P gradient. Our results indicate C. equisetifolia plantation can sequestrate a large amount of C in biomass on poor soils compared with other ecosystems. Based on the widespread of C. equisetifolia on tropical and subtropical coasts, we suggest that C. equisetifolia shelter plantation could be a nature-based solution for climate change mitigation for its high C sequestration rate.

Plastics have provided many conveniences in our lives, but they also pose a serious threat to the ecological environment. Poly (ethylene terephthalate) (PET) is one of the most abundant synthetic polymers produced and is accumulating in the environment at an alarming rate as discarded packaging and textiles. Recently, a study found that the PET-degrading enzyme (PETase) contained in the bacterium Ideonella sakaiensis 201-F6 can hydrolyze PET, but the enzyme activity is relatively low. In the enzymatic degradation process of PET, the spatial distance between PET plastic and PETase plays a crucial role in the functioning of PETase. This study used the SpyTag-SpyCatcher system and enhanced biofilm to shorten the distance between PETase and PET plastic. Through p-NP analysis, we found that shortening the distance between the enzyme and the substrate can improve the degradation efficiency of PETase. The engineered bacteria achieved effective degradation of PET by optimizing the adsorption and degradation processes in the PETase enzymatic reaction.

General Secretary Xi Jinping pointed out in the report of the 20th CPC National Congress, “We must firmly establish and practice the concept that green water and green mountains are golden silver mountains, and plan development from the perspective of harmonious coexistence between human beings and nature.”Ecological construction in pastoral areas is an important part of national ecological construction. With the advent of the new century, significant progress has been made in the economic and social construction of pastoral areas under the support and investment of the State, and the living conditions of the herdsmen have been significantly improved. However, there are still many problems in the development of pastoral areas. Especially the severe test of grassland ecological environment. Under these circumstances, the protection and restoration of the grassland ecological environment has become urgent.

With the more prominent environmental problems, in order to solve the automobile exhaust emissions and energy crisis, this paper takes hybrid technology as the entry point to discuss the application of new energy vehicles. By taking hybrid electric vehicles as an example, their advantages in environmental protection and fuel economy are studied, and some solutions such as intelligent energy management and diversified energy supply are proposed. The research results aim to provide reference for relevant personnel and projects, promote the further development of new energy hybrid vehicle technology, and contribute to sustainable travel and environmentally friendly transportation.