Over the past 150 years, how has fossil fuel consumption affected the carbon dioxide concentrations in the atmosphere? increased fossil fuel use has decreased atmospheric carbon dioxide concentrations. the use of fossil fuels has had no effect on atmospheric carbon dioxide concentrations. decreased fossil fuel use has decreased atmospheric carbon dioxide concentrations. increased fossil fuel use has increased atmospheric carbon dioxide concentrations.

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.

On the map below, which of the following rivers is identified by blue? the huang he river the yangtze river the han river the naktong river

Which of the following is evidence to the past existence of glaciers?