What was the role of conquistadores and encomienda in establishing a spanish empire in the new world?

Iwill give anyone points if they me right now q: sustainable development is related to pollution in that a. sustainable development allows pollution to continue at current levels.b. sustainable development increases pollution of all types.c. addressing pollution is a factor in sustainable development.d. sustainable development incorporates pollution as a benefit.e. pollution levels will decrease with development.

Cigarette manufacturers purposefully add to cigarettes in order to give them a particular flavor. a. cocaine b. carcinogens c. cigarette ashes d. a and b

Why does the blending of many different diciplines present both challenges and opportunities to enviromental scientist?