Indicate whether the following statements are true$/$false

$1.$ Mineral$-$bearing rock in which the mineral of interest can be mined are known as overburden rock.

$2.$ The worthless minerals are referred to as gangue minerals.

$3.$ A tailings storage facility is an engineered structure made up of water and sand only.

$4.$ Sufficient sulphide mineral concentrations generate long term acid drainage problems.

$5.$ Spoils may provide the foundation for new life post rehabilitation.

$6.$ Underground mining involves land clearing and overburden removal before minerals are exposedfor excavation.

$7.$ Rehabilitation involves the establishment of sustainable ecosystems or alternative vegetation,depending upon desired post$-$operational land use.

$8.$ Rehabilitation planning starts before mining begins.

$9.$ Sustainable business practices can help mining companies obtain and maintain a capital licenseto operate$\mathrm{.}10.$ Progressive rehabilitation refers to the rehabilitation of worked out, or surplus areas whileextractive operation continue.

$11.$ Rehabilitation works become more efficient using the necessary operating machinery on site thantransporting machine back to site.

$12.$ To receive a permit for mining, the company is generally required to carry out an EnvironmentalImpact Assessment.

$13.$ Major environmental impacts arising from mining and mineral processing activities may notinclude nuisance and disturbances.

$14.$ Acid mine drainage is caused by the oxidation of pyrite when it comes in contact with watercontaining dissolved oxygen.

$15.$ All sulphides minerals are acid$-$generating during oxidation.

$16.$ The most effective method of preventing acidic drainage is subaqueous disposal.

$17.$ Water and wastewater management constitute the secondary environmental concern at mostmetal mines.

$18.$ The waste materials from underground mining, quarries or open cast excavations are generallyknown as mine spoil.

$19.$ Characteristics of safe mines include commitment to risk management and training.

$20.$ Open pits, waste rock piles, tailings management facilities, and stockpiles are potential sourcesof land degradation.