This study analyzed water and soil quality and environmental impacts of shrimp farming in the southwestern coastal region of Bangladesh. Shrimp farming in the region is very traditional in nature where two culture systems viz. shrimp-rice and shrimponly are being practiced, which are characterized by lower production, repeated stocking, irregular feeding, and fertilizing. Water quality in both farming systems was found suitable for optimum growth and survival of shrimp (Penaeus spp.). The level of 5-day biological oxygen demand (BOD 5 ) in both systems even in canal water was within the recommended level provided by the Government of Bangladesh which is less than 5 mg/l. Therefore, effluents of shrimp farms in the study area did not show any nutrient pollution on the surrounding environment. However, saltwater intrusion has caused many problems like loss of agricultural production, reduced availability of fodder for livestock, and fresh water for domestic uses in the coastal region. The findings of this study confirmed that shrimp farming using saline water have long-term effect of soil salinization. As a result, it poses a real threat toward sustainability of coastal shrimp farming as well as coastal development in Bangladesh.

Bangladesh has the highest density of population among all countries of the world and is the worst victim of environmental degradation. Poor people are dying of arsenic contamination in Bangladesh’s villages and poor urban dwellers are most exposed to the poisonous air. Protection of the environment is therefore necessary even from the view of social justice. In particular, as Bangladesh proceeds towards industrialization it needs to be careful about environmental impacts. There are several reasons why Bangladesh needs to be extra careful and gain more knowledge of the environment. The country now relies greatly on foreign capital, which is more likely to be guided by immediate profit concerns and lead to many environmentally risky and damaging decisions. Environmental education (EE) can help people become aware of the consequences of their actions, provide information to help solve environmental problems, and build the human capacity necessary to solve and prevent environmental problems. In this sense, Bangladesh can save itself from environmental disasters by having a strong, broad‐based, and united environment movement through educating its population environmentally and developing career paths in fields related to sustainable development. A balance between environmental stewardship and economic development can guarantee this sustainable future, which in turn needs sound environmental knowledge among both experts and the population at large. The paper discusses the present environmental situation in Bangladesh; EE needs, practices and future potentialities for sustainable development; and a job market of EE graduates in Bangladesh and around the world. Finally, the paper recommends a sustainable policy framework of EE and its future in Bangladesh to the national policy makers for sustainability of this country.

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Ecoregionization is a process of delineating and classifying ecologically distinctive areas of ecological land. Each area can be viewed as a discrete system that has resulted from the mesh and interplay of the geologic, landform, soil, vegetative, climatic, wildlife, water, and human factors where ecological functions and processes are continuing. The dominance of any one or more of these factors varies with the given ecological land unit. This holistic approach to land classification can be applied incrementally on a scale‐related basis from site‐specific ecosystems to very broad ecosystems (1). Ecological processes, evolutionary mechanisms, and geological forces are continually reshaping landscapes across various scales of time and space and result in distinctive but dynamic ecoregions. All of the world's food and most medicines and raw materials are derived from these processes and associated biodiversity. Thus ecoregions gain their identity through spatial differences in a combination of landscape characteristics. Several factors such as topography, hydrology, and nutrients are important to identify these characteristics that may vary from one place to another in an ecoregion.

An investigation focused on bio-chemical evaluation of Tiger Shrimp, Bagda (Penaeus monodon) of different ranges of marketable size collected in fresh condition from Koiya Bazar that stored in ice at a ratio of 1:2 of shrimp: ice at Fisheries and Marine Resources Technology (FMRT) Discipline of Khulna University, Bangladesh. Iced storage trial was carried out over 14 days and analyzed TVB-N, TMA, and pH. The range of TVB-N, TMA, and pH are between 2.692 ± 0.172 mg/100g to 16.118 ± 0.032 mg/100g, 5.385±0.026458 mg/100g to 10.764±0.036056 mg/100g, and 6.6 ± 0.1 to 7.2 ± 0.152 respectively. Highly positive relationship was observed between storage days and TVB-N values (r2 = 0.7722), TMA values (r2 = 0.7095), and pH value (r2 = 0.9007). The overall results of TVB-N and TMA-N contents of P. monodon stored in ice rose as spoilage advanced. pH also increased with the increase in spoilage cause by bacteria. There are some discrepancies that should be that need for further investigation, particularly for daily de-gassing, prevention of the formation of bubbles in the reagent line.

Noise is considered as a sound of independent loudness and an environmental pollutant, produces in conjunction with various anthropogenic activities and becomes hazardous to all living being. In this aspect, the research determined a noise inventory for urban and rural settings in Khulna District of Bangladesh and identified the relevant sources from which the noise produced such as urbanization, industrialization and motorization activities. Sound level meters and questionnaires were used for noise measurement and public perceptions regarding noise pollution in 2005 respectively. The research finds out higher values than the Bangladesh standard almost every sensitive areas like hospitals and schools. The identified noise-levels have the significant impacts on physical and mental health of the stakeholders particularly to the senior citizens, students and children. In addition, the research makes a comparison of noise levels between urban and rural settings, where the comparison shows that noise-levels are closely related with traffic volume, vehicles number, its quality and composition such as trucks, buses, auto rickshaws, construction activities, various machineries and other such tools and activities. The research also analyzes the people’s perception on the noise effects of both urban and rural areas to find out a sustainable remedial measure. The health effects include suffering from headache, bad-temper, sleeplessness, aggravation, hearing problems and other relevant diseases.

Seeds of oryza sativa were cultivated in the seedlings and the effects of urea on the changes of pH in the soil and growth of paddy were observed.  Urea (80 kg/ha) was applied to one of the seedlings after 20 days of germination and the soil pH and length of paddy were determined from 25 days of urea application.  Soil pH was gradually decreased with increasing paddy grown in the control seedling.  However, no changes of pH were found in the urea treated seedling up to 20 days of germination and were similar to the control paddy.  The pH of soil compared to the control falls gradually with increasing paddy growth.  We also examined the effect of urea on paddy length and compared to the control paddy.  Paddy length was gradually increasing in both the control and urea treated seedlings from the germination.  However, higher length was found in the urea treated seedling.  Up to 20 days of germination of paddy, no differences of paddy length in the two seedlings were observed.  These findings suggest that urea is the potent compound inducing growth of paddy and pH measurements indicate the period where optimum uptake of urea is happened.