How does the sahara desert act like a barrier

Use your vocabulary words to complete the sentences below. more of the world's population is now concentrated in heavily populated urban areas known as a this is quite a contrast from the past when or native groups were either farmers or — hunters and gatherers who moved between places in search of food. advanced technology has led to the integration of world economics and cultures, in the world's more developed countries. this integration requires , the responsible use and management of natural resources.

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

Dose local topography and sea surface temp contribute to differences in climate between baeious localities