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In Bangladesh, the official permissible threshold level of salt in groundwater for the coastal districts is set at 1,000 ppm or 1,500 μS/cm, which is higher than the standard set at 600 ppm (or mg/L) for the rest of the country. [24] It is also higher than the standard set by the World Health Organization of 250 mg/L. [28]
Notes: 1 atm = absolute pressure of 101.325 kPa or 1.01325 bar; mol = gram mole and kmol = 1000 gram moles Pollution regulations in the United States typically reference their pollutant limits to an ambient temperature of 20 to 25 °C as noted above.
An individual score (Individual Air Quality Index, IAQI) is calculated using breakpoint concentrations below, and using same piecewise linear function to calculate intermediate values as the US AQI scale. and The final AQI value can be calculated either per hour or per 24 hours and is the max of these six scores.
Average concentrations of PM2.5 - small airborne particles that damage the lungs - reached 79.9 micrograms per cubic metre in Bangladesh in 2023, and 73.7 micrograms in Pakistan.
Visa can be issued on arrival for those who need to enter China urgently for humanitarian reasons or have other urgent needs. Relevant supporting documents must be provided. This policy applies to all foreigners including citizens of Bangladesh. [17] No visa required for Diplomatic and Official Passport holders. Colombia: Online Visa [3] [18 ...
Under this new policy, business and tourist visas are issued online free of charge within 24 hours to citizens of 126 countries. To benefit from the program, eligible travelers can obtain a visa pre-approval, called a Visa Prior to Arrival, via the Ministry of Interior’s online platform at least 48 hours before their intended entry to Pakistan.
Arsenic contamination of the groundwater in Bangladesh is a serious problem. Prior to the 1970s, Bangladesh had one of the highest infant mortality rates in the world. Ineffective water purification and sewage systems as well as periodic monsoons and flooding exacerbated these problems.
In the metric system, a microgram or microgramme is a unit of mass equal to one millionth (1 × 10 −6) of a gram. The unit symbol is μg according to the International System of Units (SI); the recommended symbol in the United States and United Kingdom when communicating medical information is mcg .