কনটেন্টটি শেষ হাল-নাগাদ করা হয়েছে: মঙ্গলবার, ১৮ নভেম্বর, ২০২৫ এ ০৫:৩৪ PM
কন্টেন্ট: পাতা
Environment and its components climet changes and global worming Water Safe and wholesome water Sources, uses and requirement of water Water impurities Principles and methods of purification of water Water quality standards for drinking water Water borne diseases
Air and ventilation Composition of air Air pollutants and their sources Indicators of air pollution Effects of air pollution on health Methods of prevention and control of air pollution Ventilation
Climate change and green house effect Light Criteria of good lighting Measurements of light
Effect of improper lighting on health Noise Sources and properties of noise Acceptable noise levels Effects of noise exposure
Control measures of noise Radiation Sources and types of radiation Effects of radiation on health Measures of radiation protection
Creiteria of healthfulh housing Housing standards Effects of poor housing
Disposal of solid waste Solid waste and its sources Methods of disposal and medical biotechnology Health hazards of solid wastes
Excreta disposal Methods of excreta disposal Sanitation barrier Diseases borne by human excreta