There is more gold in 1 km3 of the ocean than the amount of gold mined in all of recorded history. How come we do not mine the oceans?
A) It is too dilute to separate.
B) It would take too much energy.
C) It would cost too much.
D) all of the above
E) none of the above
D
Environmental & Atmospheric Sciences
You might also like to view...
What does it mean when air is said to be in hydrostatic equilibrium?
Environmental & Atmospheric Sciences
The main reason why moist air is lighter than dry air is that the molecular weight of water is less than that of either molecular nitrogen or molecular oxygen
Indicate whether the statement is true or false
Environmental & Atmospheric Sciences
The Montreal Protocol of 1987 was an international treaty that halted the production of ________
A) nuclear weapons B) carbon dioxide C) water vapor D) automobiles E) chlorofluorocarbons
Environmental & Atmospheric Sciences
Biomagnification is most closely associated with ________
A) elephants B) ozone C) carbon dioxide D) DDT E) loud birds
Environmental & Atmospheric Sciences