ব্যাঙের আধুলি (সামান্য ধন বা সম্পদ): এ ব্যাঙের আধুলি দিয়ে আমার কিছু হবে না ।

প্রথম ছাব্বিশটি মৌলিক সংখ্যা হল: ২, ৩, ৫, ৭, ১১, ১৩, ১৭, ১৯, ২৩, ২৯, ৩১, ৩৭, ৪১, ৪৩, ৪৭, ৫৩, ৫৯, ৬১, ৬৭, ৭১, ৭৩, ৭৯, ৮৩, ৮৯, ৯৭, ১০১।

Waste Management

Waste management means collecting, transporting, processing, recycling and monitoring of the waste materials. The term waste management generally relates to those materials which are produced by human activity and is usually undertaken to reduce the effect of these activities on their health and environment. Waste management is also useful to recover useful resources from the waste. Waste management involves all solid, liquid and gaseous or radioactive substances which are managed with different methods and expertise is required for each of them. Waste management practices are different for different countries of the world be it developed or developing nations. The management is different for urban and rural areas, for residential and industrial waste producers Management of residential and institutional waste in cities and metros is done by the local government authorities or what we call as Municipal Corporation, while management of non hazardous commercial and industrial waste is done by the generator of such waste, Reduce Reuse, Recycle" are known as the 3R of the waste hierarchy. Recycling involves processing used materials to make a new product which prevents waste of potentially useful materials that will reduce the consumption of fresh raw materials and reduce the energy usage, water pollution and reduce air pollution by reducing the need for "conventional" waste disposal, and lower the greenhouse gas emissions as compared to original and fresh production. Recycling is a key component of modern waste reduction and is the third component of Recyclable materials include many kinds of glass, paper, metal, plastic, textiles, and electronics. Although similar in effect, the composting or other reuse of biodegradable waste - such as food or garden waste - is not typically considered recycling. Materials to be recycled are either brought to a collection center or picked up manufacturing. Recycling Saves money, energy, trees and the Earth. Recycling of a material will from the curbside, then sorted, cleaned, and reprocessed into new materials bound for produce a fresh supply of the same material such as used office paper can be converted into new office paper. This is often difficult and expensive so "recycling" of many products involves their reuse in producing different materials. Another form of recycling is the salvage of certain materials from complex products due to their intrinsic value like lead from car batteries or gold from computer components, or due to their hazardous nature. The costs and energy used in collection and transportation outweigh the costs and energy saved in the production process which is a disadvantage of recycling and also that the jobs produced by the recycling industry can be of poor trade. Also materials like paper pulp are such which can only be recycled a few times before degradation prevents further recycling.