A transboundary source refers to what?
a. Water pollution that begins in one country and ends up polluting other countries as well
b. A natural resource that provides to two countries
c.Any water barrier between two countries
d. A land mass dividing two countries
a. Water pollution that begins in one country and ends up polluting other countries as well
b. A natural resource that provides to two countries
c.Any water barrier between two countries
d. A land mass dividing two countries