What happens when oceanic crust collides with continental crust at a plate boundary? a. the continental crust moves closer to the mantle.            b. the oceanic crust floats above the continental crust. c.some oceanic crust is consumed into the mantle. d.fresh oceanic crust is formed along the boundary line. e.ocean water changes the continental crust into oceanic crust.

economic impact of malaria is estimated to cost africa $12 billion every year. this figure factors in costs of health care, absenteeism, days lost in education, decreased productivity due to brain damage from cerebral malaria, and loss of investment and tourism.

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this