<h2>Correct answer:</h2>
<em>Mi amiga no vive en mi ciudad. Ella vive muy lejos en Europa. Para llamarla, necesito hacer una llamada de </em><em>larga </em><em>distancia.</em>
llamada de larga distancia means long-distance call. Since my friend lives far away from Europe, I need to make a long-distance call to talk to her. This type of calls can be made in a phone booth, so perhaps you need to pay to do this.
Answer:
la causa principal es la quema de combustibles fósiles
