نتایج جستجو برای: pollution levels

تعداد نتایج: 979089  

2016
Jessica L. Yorzinski Fredrick S. Hermann

Natural environments are increasingly exposed to high levels of noise pollution. Noise pollution can alter the behavior of animals but we know little about its effects on antipredator behavior. We therefore investigated the impact of noise pollution on vigilance behavior and roost selection in an avian species, peafowl (Pavo cristatus), that inhabits urban environments. Captive peahens were exp...

2017
Dongsheng Zhan Mei-Po Kwan Wenzhong Zhang Shaojian Wang Jianhui Yu

In recent years, severe and persistent air pollution episodes in China have drawn wide public concern. Based on ground monitoring air quality data collected in 2015 in Chinese cities above the prefectural level, this study identifies the spatiotemporal variations of air pollution and its associated driving factors in China using descriptive statistics and geographical detector methods. The resu...

2016
Sangita Vyas Nikhil Srivastav Dean Spears

Particulate pollution has important consequences for human health, and is an issue of global concern. Outdoor air pollution has become a cause for alarm in India in particular because recent data suggest that ambient pollution levels in Indian cities are some of the highest in the world. We study the number of particles between 0.5μm and 2.5μm indoors while using affordable air purifiers in the...

Journal: :international journal of advanced design and manufacturing technology 0
venkata krishna murthy vivekananda institute of science and information technology, affiliated to jntu, hyderabad m.v.s. murali krishna chaitanya bharathi institute of technology, gandipet, hyderabad-500 075. andhra pradesh, india

investigations are carried out to evaluate the performance of a low heat rejection (lhr) diesel engine consisting of air gap insulated piston with 3-mm air gap, with superni (an alloy of nickel) crown and air gap insulated liner with superni insert with different operating conditions of crude jatropha oil with varied injection timing and injection pressure.  performance parameters of brake ther...

2011
Daniel E. Rush

In this paper we develop a model to simulate the evolution of a pollution-free resource gathering technology that is initially less efficient but ultimately reaches parity with polluting technology. We find that for low levels of pollution, pressure exerted by society can indeed encourage the development and use of non-polluting technology, with greater pressure being associated with faster ach...

Journal: :Environmental Health Perspectives 1995
K Katsouyanni

Recent results suggest that adverse health effects of air pollution exist at levels of pollutants around or even below air quality standards set by national and international institutions. Furthermore, there are indications that air pollution effects on health may be partly determined by specific mixtures of air pollutants and may be altered by other environmental, behavioral, and social patter...

2011
Aaron M Harris Fernando Sempértegui Bertha Estrella Ximena Narváez Juan Egas Mark Woodin John L Durant Elena N Naumova Jeffrey K Griffiths

BACKGROUND Ambient air pollution and malnutrition, particularly anemia, are risk factors for pneumonia, a leading cause of death in children under five. We simultaneously assessed these risk factors in Quito, Ecuador. METHODS In 2005, we studied two socioeconomically similar neighborhoods in Quito: Lucha de los Pobres (LP) and Jaime Roldos (JR). LP had relatively high levels of air pollution ...

Introduction: Heavy metals (HMs) accumulated in the road dust may be transferred to the surrounding land and water bodies and pose ecological risks. Hence, such pollution should be considered, especially in coastal roads. This study focuses on the HMs pollution of dust settled on the surface of coastal roads along the Persian Gulf in Bandar Abbas city. Materials and Methods: In this study, ro...

Journal: :Environmental Health 2008
Fredrik Niclas Piro Christian Madsen Øyvind Næss Per Nafstad Bjørgulf Claussen

OBJECTIVE To explore various contributors to people's reporting of self reported air pollution problems in area of living, including GIS-modeled air pollution, and to investigate whether those with respiratory or other chronic diseases tend to over-report air pollution problems, compared to healthy people. METHODS Cross-sectional data from the Oslo Health Study (2000-2001) were linked with GI...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید