These factors cause environmental problems in sub-saharan africa. deforestation development integrated resource management negative population growth positive population growth (select all that apply)

Deforestation, certainly. I'm not sure what you mean by development... please elaborate. And, of course, positive population growth. Because of the minimal education in Sub-Saharan Africa, a lack of internal infrastructure like roads, hospitals, and water treatment plants, and little social institutions like health care, Sub-Saharan Africa has a high death rate as well as a high birth rate. It ranges from a 1 to a 2 or even 2.5 on the demographic transition model, depending on which area you are focusing on.

Deforestation and positive population growth I do believe. 

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen

D.