Modern technology has developed in a manner which often conflicts with the envir

Moderntechnology has developed in a manner which often conflicts with the environment．Nevertheless, it is possible andpractical to achieve a high level of technology without altering the overallnatural environment.

    There are two basic methodsof conserving(保护) the natural environment．One is alternative technology in whichtechniques (such as windmills and solar energy) must be found for providingpower．The other is to try to minimizethe effects of modern technology by the more efficient use of materials andmore effective pollution control．Therecomes a point when the quality of life can no longer be improved because of thehigh population density(密度) and the largely unsuccessful at tempts to meet its demands.

    Present energy policies ofthe western world are considering new energy sources to meet the demands of agrowing population．The main sources used have been oil, gas, and coal- which are inlimited supply- and nuclear power, which has problems concerning radioactivewaste storage．Wind and solar energy are alternative possibilities, but only solarenergy is likely to become a main power source for many countries.

    Many of the materials useddaily in a technological society are destined(注定)to be discarded, Rags, paper, metal, glass, and plastics are all substancesthat could be recycled or reused．Research is being done to determine methodsof separating useful products from industrial and domestic waste.

    The processing of sewagerequires considerable amounts of electricity．Many sewage treatment plants in the U.S．have become self-sufficient byusing the methane gas(沼气) given off by sewage．This is collected in gas holdersand burned to produce heat and create electricity．The solid waste itself is often used for soilenrichment.

1．Modern technology is harmful tothe natural environment because ________

A．of industrial pollutants.

B．it has become too expensive.

C．it has become too complicated.

D．it consumes all natural resources.

2．Alternative technology suggeststhat ________

A．new ways be found to burn coal,oil and gas.

B．solar energy and wind power beconsidered.

C．new ways be found to storeradioactive waste.

D．the present energy resources befully used.

3．Methane gas in used to ________

A．conserve(保存)industrial residues (废料).

B．create recycled paper products.

C．provide electricity to process sewage.

D．treat with the raw sewage.

4．From the selection, we candetermine that ________

A．conservation technology is anecessity.

B．nuclear power is the energy sourceof the future.

C．problems of energy conservationare not worldwide.

D．all the industrial and domesticwastes can be reused and recycled.

5．Processing sewage requires largequantities of ________

A．water.

B．electricity.

C．gas.

D．oil.

试题答案

答案：ABCAB