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This book discusses the development, types and application principles of portable air purifiers in China. It analyzes the theoretical characteristics of air purifiers under various operational conditions, and points out that the term “Clean Air Delivery Rate” cannot be used to precisely reflect the problems that occur under various operational conditions. By comparing theoretical and measured data, it highlights the main features of air purifiers and key points in the design process for different applications. Calculation methods for the indoor particle concentration and the self-purification time are also provided. The book describes the conditions for window opening in smog and for selecting air purifiers, and proposes a new method for improving their measurement. In closing, it includes a new assessment index. .

Air --- Purification. --- Environmental protection. --- Engineering. --- Building Physics, HVAC. --- Atmospheric Protection/Air Quality Control/Air Pollution. --- Machinery and Machine Elements. --- Construction --- Industrial arts --- Technology --- Environmental quality management --- Protection of environment --- Environmental sciences --- Applied ecology --- Environmental engineering --- Environmental policy --- Environmental quality

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Batam's economic transformation has been accompanied by a marked degradation of its natural environment. Enforcement to protect the environment has often been inadequate on many fronts, exacerbated by population increases. Though regulations exist for the provision of public amenities like wastewater and sewerage treatment, existing facilities are run-down and ill-equipped to cope with the present demands. The capacity of reservoirs to meet the present demand for water is also strained because of the large population base, with illegal intrusion and squatters further threatening supplies. Economic and environmental imperatives can be reconciled if more emphasis and resources are put into enforcing regulations and protecting the environment.

Economic development --- Environmental degradation --- Environmental law --- Environmental aspects --- Degradation, Environmental --- Destruction, Environmental --- Deterioration, Environmental --- Environmental destruction --- Environmental deterioration --- Natural disasters --- Environmental quality --- Development, Economic --- Economic growth --- Growth, Economic --- Economic policy --- Economics --- Statics and dynamics (Social sciences) --- Development economics --- Resource curse --- Environmental protection --- Batam (Indonesia) --- Economic conditions. --- Environmental quality management --- Protection of environment --- Environmental sciences --- Applied ecology --- Environmental engineering --- Environmental policy --- BUSINESS & ECONOMICS / Economic Conditions.

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Springs --- Spring ecology --- Environmental protection --- Water conservation --- Conservation of water --- Water --- Conservation of natural resources --- Environmental quality management --- Protection of environment --- Environmental sciences --- Applied ecology --- Environmental engineering --- Environmental policy --- Environmental quality --- Freshwater ecology --- Thermal waters --- Bodies of water --- Groundwater --- Environmental conditions. --- Citizen participation. --- Conservation --- Barton Creek (Hayes County and Travis County, Tex.)

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How we determine what is nature, what is wild, or even what in nature is worth protecting occurs through our human perspective. Whether it is a charismatic manatee or a majestic redwood, we care about and protect the things we love because they offer us something we value. To make this value relevant in the economic marketplace of competing choices, Wild Capital: Nature's Economic and Ecological Wealth relies on the ecosystem services model, where nature's value is determined through the services intact ecosystems provide to our well-being. As one of the recreation components of this model, this book uses ecotourism and the changing tourist dynamic, as well as our evolving relationship with nature, to demonstrate how we can assign a measurable worth to natural resources.

Environmental protection. --- Conservation of natural resources. --- Natural resources --- Resource management (Natural resources) --- Resources management (Natural resources) --- Conservation of resources --- Natural resources conservation --- Resources conservation, Natural --- Environmental protection --- Natural resources conservation areas --- Environmental quality management --- Protection of environment --- Environmental sciences --- Applied ecology --- Environmental engineering --- Environmental policy --- Environmental quality --- Management. --- Conservation --- Conservation of natural resources --- Management --- Natural resources - Management

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For the past three decades scientists have urged us to abandon fossil fuels as rapidly as possible. Despite these pleas, the global energy sector has retained a familiar profile, dominated by the use of oil and natural gas. Only states have powers that are commensurate with rapidly reshaping societies in sustainable ways, but how do their politics enable these surges in sustainability? 'Shocks, States, and Sustainability' answers this question through a comparative historical study of four radical environmental reforms: in the Dust Bowl during the New Deal, in Britain after World War II, in Cuba after the Soviet collapse, and in the Gulf of Maine after the Depression. This analysis suggests that states reform environmental practices in the aftermath of focusing events that draw popular attention to environmental degradation and suggest sharp limits in the availability of natural resources.

Sustainable development. --- Environmental policy. --- Environmental protection. --- Environmental quality management --- Protection of environment --- Environmental sciences --- Applied ecology --- Environmental engineering --- Environmental policy --- Environmental quality --- Environment and state --- Environmental control --- Environmental management --- Environmental protection --- State and environment --- Environmental auditing --- Development, Sustainable --- Ecologically sustainable development --- Economic development, Sustainable --- Economic sustainability --- ESD (Ecologically sustainable development) --- Smart growth --- Sustainable development --- Sustainable economic development --- Economic development --- Government policy --- Environmental aspects