Why are environmental issues a major concern for the people of sub-saharan africa? almost all of their food is imported. their livelihoods are derived from the land. they are the world's leading coal supplier. they produce almost all of the world's gasoline.

The most direct route from south america to asia is across the ocean.

Why might a single rock layer exhibit different types of sedimentary rocks within it? view available hint(s) why might a single rock layer exhibit different types of sedimentary rocks within it? such a rock layer, termed a facies, when traced laterally represents a variety of depositional environments that formed in a sequence over time. such a rock layer, termed a facies, when traced laterally represents a single depositional environment that formed over time. such a rock layer, termed a facies, when traced vertically represents a variety of depositional environments that formed at the same time across a broad area. such a rock layer, termed a facies, when traced laterally represents a variety of depositional environments that formed at the same time across a broad area. such a rock layer, termed a facies, when traced vertically represents a variety of depositional environments that formed in a sequence over time.

Due to its high humidity, the south often experiences severe storms with heavy rains called cyclones ,hurricanes, monsoons, tornadoes