Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Conservation of mineral resources:
Mineral reserves are present in a limited quantity and they can be exhausted. At the present rate of consumption many of them will not last long. Conservation means that there should be judicious use with minimum wastage. One way of minimizing or reducing wastage is recovering as much as possible and leaving nothing as waste. The quality of lower grade ore can be improved by processes which remove undesirable materials like earth, rock etc. and give enriched ore. As described in the previous part, scrap of used metals can be recycled or used again. This will reduce the pressure of demand on many mineral reserves.
The alloys of magnesium are fast replacing steel and are also reducing the demand for copper, lead and tin which are in short supply. There is a need to find substitutes for metals like mercury, gold, silver, platinum etc. and also for asbestos. Further, the natural environment of the area from where the mineral ores have been taken out needs to be protected from deterioration. The dug out parts are devoid of nutrients. Hence, they remain barren and do not allow the growth of any vegetation. Such waste or damaged lands can be covered by fresh topsoil. Use of fertilisers, sewage water, domestic or municipal waste, farmyard manure, etc. will help in restoring the fertility of these degraded lands.
Observing the phases of the moon Over the time of a lunar month have the children make nightly observations and illustrate drawings of the moon. Start at new moon and continue
general characters of cylintreta
why is oxygen is important to plants?
When, in the geologic column, did dinosaurs become extinct at the Cretaceous-Tertiary boundary
Non-renewable Resources: After learning about the renewable resources like water, forests etc., you would like to know what our non-renewable resources such as land, mineral,
Explain Mouth To Mouth Respiration If no instrument is available, one's own lung may be used as a positive pressure pump. Air may be blown into the lungs of the subject by way
Observe how a metal tyre is fitted on the wheel of bullock cart
how semiconductor detector works
my research topic is based on water consumption efficiency. I need definitions of the following keywords; efficiency consumption, water use behavior / pattern; water end uses, wat
identify ten diagnostic medical terms that use suffixes note note suffixes and provide definitions
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd