Question

BRIGHT PROSPECTS
Energy: Solar power is in the ascendant
Unlike fossil fuels, which produce significant amounts of pollution and enormous amounts
of greenhouse gases, the sun's energy is clean and its supply virtually limitless. In just one hour
the Earth receives more energy from the sun that human beings consume during an entire year.
According to America's Department of Energy, solar panels have the potential to provide for all of
its current electricity needs.
Yet since they were invented more than five decades ago, photovoltaic solar cells - devices
made of semiconductor materials that convert light into electricity - have generated much
publicity but little energy. In 2006 solar panels produced only 0.04% of the world's electricity,
according to the International Energy Agency. Solar panels have few customers and the problem is
their price. Sunshine is free, but converting it into electricity is not. At present, solar power is at
least two to three times as expensive as the typical electricity generated in America.
Even so, many people believe that solar power will be very popular one day, maybe soon.
Decades of research have improved the efficiency of silicon-based solar cells, and the price of
solar power is expected to be competitive within three to eight years. Wal-Mart, the American
retail giant, is placing solar systems on the roofs of many of its supermarkets. Besides producing
favorable publicity, the appeal of using solar power is obvious...and bright.
(Adapted from "Bright prospects", in The Economist -
Technology Quarterly, March 10th, 2007)

01. Answer these questions in Portuguese according to the text:

a) Cite duas consequências do uso excessivo de combustíveis fósseis?

b) A luz natural do sol é gratuita. O que encarece a utilização?​

Answer 1

Resposta:

não da pra intende essa pergunta ela esta em inglês