Chapter 20

Chapter 20

1. global warming

   • is happening now
     • even as we work to reduce global warming emissions, we must also prepare to face this dengerous new reality without giving up
   • the hottest year ever recorded for the USA ocurred in 2012
   • is already having significany and costly effects that will only intensify as the planet's temperature continues to rise
   • every one of the past 38 years has been warmer than the 20th century average
   • the plane's temperature is rising in a clear and unmistakable trend
   • occus mainly by desforestation

2. grammatical part

   • conditional sentences
     • uso
       • modals
         • may/might/can/could
       • imperative
         • para dar uma ordem ou instrução
       • were
         • usado em vez de was nas orações condicionais
       • simple present
         • expressar leis naturais e verdades universais
       • if
         • em condições impossíveis