The soils of the rain forests, deserts, and savannas are fertile.

I think you wanted to know whether the statement in question is true or false. Based on this assumption, i am answering the question. It is absolutely true fact that the soils of the rain forests, deserts and savannas are fertile. I hope that this answer has come to your immense help.

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