Según la clasificación climática de Köppen las siglas Dw corresponde al tipo de clima y al tipo de región

Which of the following is a way that advancements in technology improve humans' ability to measure air quality and protect human health?

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4

The vegetation that thrives in the tundra is limited to a. mosses, barley, wheat, and corn. b. coniferous trees. c. dwarf shrubs, mosses, lichen, potatoes, and beans. d. mosses, lichen, algae, and dwarf shrubs.