Pollution is always a consequence of exploitation of resources. ...

[Caiter2013]

Pollution is always a consequence of exploitation of resources.
 
  What will be an ideal response?

Question 2

In the classical Drude model of electricity, resistance occurs because the charge carriers, which are accelerated due to electric forces, collide with the atoms of the metal wire, causing them to bounce backward.
 
  What should you expect the Drude model to predict for the relative resistance of two materials, one of which has twice as many atoms in each cubic meter of material?

[cupcake16]

Answer to Question 1

There must be a disturbance locally to exploit a resource. There will at least be a
local pollution problem for most extraction unless great care is exercised. Some examples
of successful reduction of pollution may include pumping of saline water from oil wells
back into the formation, pumping mineral-laden brine back underground after exploiting
hot, wet steam, etc. These shining examples are currently the exception.

Answer to Question 2

Because there are more opportunities for collisions with twice as many atoms in
each volume, we would expect the resistivity (and the resistance) to be double that of the
material with fewer atoms per cubic meter.

[Caiter2013]

Excellent

[cpetit11]

Gracias!