Question

10 multiple choice 1 point air pollutants that are emitted in one country may travel on wind currents far across the globe and affect other countries. this is an example of a... transboundary problem international treaty command-and-control approach internal cost

Explanation:

To solve this, we analyze each option:

• "Transboundary problem" refers to issues that cross national boundaries, like air pollutants moving between countries.
• "International treaty" is a legal agreement between countries, not a problem example.
• "Command - and - control approach" is a regulatory method, not related to the pollution crossing borders.
• "Internal cost" is a cost within a firm or country, not about cross - border impacts.

So the correct option is the one about transboundary problem.

Answer:

A. transboundary problem