The increasing environmental awareness and growing threats to the ecology have been forcing government bodies and regulatory agencies around the world to develop newer practices, in order to create sustainable human communities. As a part of the same, there have been many developments lately to enhance the recyclability of resources, such as wastewater sludge and excreta (the primary sources of biosolids), as they are dangerous to both the human health and the environment, if not managed properly. The pollution prevention programs and industrial pretreatment in the United States have substantially reduced levels of metals and other pollutants going into wastewater treatment plants, resulting in noticeable improvements in biosolids’ quality. The capital expenditure and management of municipal wastewater treatment services has been increasing in the recent times in the United States. The Public Owned Treatment Works (POTW) in the United States produces nearly 0.16 pounds (by dry weight) of sewage sludge per person per day, among the total sewage treatment services.

Since the first highway privatisations in the mid-1990s, Brazil has been liberalising its transport infrastructure sector through concessions and public-private partnerships. This, coupled with a sharp decline in public investment since 2014 amid the country’s economic recession and political turmoil, resulted in private investment surpassing public in 2014, remaining above ever since. Given the need for substantial initial investment and previous nationalistic regulations, the private sector is still limited to a small number of large local companies, despite the government's efforts to increase foreign player participation since 2016.

China’s environmental protection sector contains three major subsectors, namely waste water treatment, solid waste treatment and recycling, and air pollution control. Besides some government guidance on the direction of development, the sector is basically market-driven. Due to the slow technological progress resulting in low entry barriers, the sector accommodates market players of all scales. However, to carry out long-term comprehensive environmental protection projects, which will become more common as the government has taken to ecological improvement and pollution control as a whole, being large in size and financially well secure is a great advantage. According to data from the China Association of Environmental Protection Industry, enterprises with individual revenue of over RMB 100mn, accounting for only 11.6% of the total number of market players, generated over 90% of the market profits in 2017.

Commercial scrubbers and sweepers are one of the fastest growing floor cleaning equipment in the world. These professional equipment provide highly efficient cleaning across all sectors of industries. With the increasing adoption of automation, consumers are using technology in many daily chores, including cleaning. The automatic floor cleaning machines provide an easier method of cleaning as compared to traditional manual methods. The use of equipment such as commercial sweepers and scrubbers can greatly reduce the time and manual labor required for cleaning. In industries, these machines provide a more ergonomic method of cleaning, thereby ensuring the safety of workers. Commercial sweepers and scrubbers thus precisely make the job of cleaning easier, faster, and safer for workers.

长江流域横跨祖国东中西部，流域范围覆盖十多个省区市，区内水资源充足，森林、湿地、荒漠等生态系统和生物多样性丰富，以不到全国五分之一的国土面积，养育了全国三分之一的人口，创造了全国接近一半的经济总量。长江流域拥有我国最为丰富和独特的生态系统、众多的野生动物、植物物种，以及美不胜收的景观，特别是该流域类型多样的森林、湿地，不仅维护了长江流域的生态平衡和长江经久不衰的生命力，更是对全流域经济社会发展乃至中华民族的生存发展起到了极为重要的支撑保障作用。

Transport is a critical driver of social and economic development, generating opportunities for the poor and facilitating economies to become more competitive. Transportation infrastructure connects individuals to jobs, health services, and education. Transportation infrastructure facilitates the supply of goods and services around the globe. For instance, rural roads help prevent neonatal and pregnancyrelated deaths by providing timely access to childbirth-related healthcare services and also help farmers to augment their revenue by connecting them to various markets.

Scrap metal recycling is a process that aims at diminishing the amount of scrap metal that is disposed of as solid waste. Disposing of this scrap metal in regular trash is leading to concerns about water pollution and soil contamination.Vendors in this industry are involved in the assortment, processing, and recycling of ferrous and non-ferrous metals. The typical metal recycling processes include sorting and shredding of scrap, which is later sold to metal smelters for further metal recovery.

RO is a technology that uses a semi-permeable membrane to remove dissolved salts or organic molecules from water. The water is pushed under pressure through the membrane, which allows the passage of water molecules but prevents the dissolved salts and bacteria from passing through.The global RO systems market is well diversified in the residential and industrial segment. In 2016, the market was dominated by the residential segment owing to the rising desalination activities worldwide. In 2021, the residential sector will continue its domination in the market followed by the industrial segment. The following exhibit reflects the market for the same in 2016 and 2021.

Industrial water treatment technologies and filtering procedures are necessary to remove contaminants from these freshwater sources before use. Industrial wastewater is the result of substances that having been dissolved or suspended in water. The objective of the industrial wastewater treatment equipment is to remove those dissolved or suspended substances. The industrial water treatment equipment must be designed specifically for the effluent produced. Various contaminants like waste matter,bacteria, algae, and germs, as well as waste generated by various industries, lead to an increase in the water contamination. The rise in industrialization also contributes to the growth of the market, owing to the increased demand for recycling the water to mitigate the contamination by these industries. The exhaustion of natural freshwater resources increases the need to recycle and reuse water through the implementation of various water treatment techniques. Water quality has been the most important parameter for most of the industries. Industries utilize huge volumes of water for various processes. Most of the industries worldwide have installed a water treatment setup to mitigate the ill-effects of contaminated water, lower operating costs, and reduce environmental footprints. Rapid industrialization and high dependence on clean water are the major drivers for water treatment equipment in the industries.