What Is a Major Cause of Negative Production Externalities

Multiple Choice

What is a major cause of negative production externalities
Associated with the mining and processing of rare earth mineral?

A) Processing of rare earth minerals generates radioactive wastes.
B) Rare earth mining is often done in less­developed countries.
C) Processing of rare earth minerals is very costly in countries that possess rare earth mineral deposits.
D) Processing of rare earth minerals generates air pollutants.