Which of these protect earth from harmful radiation when in the stratosphere but is a pullutant at lower altitudes?

Evaporite rocks te more permeable than reef rocks true false

Which barrier to economic development is shown in the following examples? i. the high rate of hiv infection in underdeveloped nations ii. the use of children as soldiers in uganda’s army in the early 2000s iii. low literacy rates in underdeveloped nations with limited exposure to adequate education a. foreign debt b. political instability c. widespread disease d. low levels of social welfare

Acanyon on the ocean floor at which the crust bends downward is called a(n)