¿En qué consisten las casas prefabricadas como opción ecológica?
¿Qué materiales son utilizados y qué países hispanoamericanos son pioneros en esas técnicas?
¿Crees que el gobierno de tu país está haciendo un esfuerzo para fortalecer las energías renovables?
Comparación cultural:
¿Qué medidas se están tomando para que su producción energética sea más limpia y verde?
Compara un país hispanohablante con otro que conozcas o que te sea familiar.

As oil prices rose during 2006, demand for alternative fuels increased. ethanol, one alternative feul, is made from corn. according to an article in the wall street journal the price of tortillas which are made from corn also rose during 2006. the price spike in tortillas is part of the ripple effect from the ethanol boom. draw demand and supply graph for corn market and use it to show the effect on this market of an increase demand for an ethanol. be sure to indicate the equilibrium price and quantity before and after the increase in demand for ethanol.

What is the direct object in the sentence yes, they will enjoy it very much

Which of these means "long verse poem"? a.haikai b.zoku c.kigo d.ch? ka