La part rocosa de la Terra es pot perforar, aconseguint materials o generant nous espais pel transport. Avui dia, quin és el producte subterrani que més s'explota al món? Quins efectes secundaris comporta? Quin és el resultat final de l'acumulació de gasos a l'atmosfera?

Ahistorian has discovered a letter written by an early roman emperor. she translates the letter and discovers that it contains orders to a general before a battle. she works to determine when the letter was written to figure out which battle the letter references.the historian in the passage is most clearly demonstrating which historical thinking skill? a. identifying causes and historical contextb. thinking chronologicallyc. making and evaluating arguments and interpretationsd. analyzing historical sources