Answer:
La opción correcta a la cual se refiere la frase "el ciudadano es el eslabón clave en esta cadena de la sostenibilidad" es:
A. La viabilidad de una ciudad depende de sus habitantes.
Explanation:
Answer:
Britain continued to export opium even though it was objected by Chinese government.
From the money that it got from exporting opium it financed it's tea imports from China.
Explanation:
Answer:
The cost of production and using more efficient resources
