¿que fuentes de energia limpias recomendarias aprovechar para que a partir de ella se puede generar energia electrica? ¿ porque?

20 points the two basic principles of economics are (choose two) question 2 options: a. the wants of society and individuals are limited. b. the wants of society and individuals are unlimited. c. the resources of society are limited. d. the resources of society are unlimited.

As you drive in to school, you hear a random radio-show caller arguing that sun exposure really has not been shown to cause skin cancer and that some research suggests that skin cancer is completely genetic and not related to sun exposure at all. at the time, you think that this is a silly argument and that the caller does not know what she is talking about. however, two months later, you are outside without wearing sunscreen, and you find yourself remembering that you had read something about how the sun actually does not cause skin cancer. this process is evidence that has influenced your attitude

The american public was excited by the invention of the railroad system. true false