Which of the following contributes to the high snowfall in the Sierra Nevada during winter?
  • High elevation and Pacific moisture
Which of the following factors has the most impact on the arid climate of the southwestern U.S.?
  • Rain shadow effect and latitude
Which U.S. region is most affected by humid air from the Gulf of Mexico, leading to thunderstorms in the summer?
  • Southeast
Which energy source has seen a dramatic increase in use in the U.S. due to its lower emissions compared to coal?
  • Natural gas
Which of the following energy resources has the least environmental impact in terms of greenhouse gas emissions?
  • Wind
What is the largest environmental concern related to coal burning for electricity generation?
  • Carbon dioxide emissions
Which U.S. region is expected to experience a significant increase in natural gas production over the next decade?
  • Marcellus Shale