Question

multiple choice 2 points what would increase energy efficiency in the united states? using public transportation and developing more efficient engines for vehicles insulating homes and businesses turning thermostats down in winter and up in summer all of the above. multiple choice 2 points which of the following is a source of alternative energy? wind turbines hydroelectric dams solar collectors hydrogen fuel

Explanation:

Using public transport cuts vehicle - energy, insulation saves heating/cooling energy, adjusting thermostats reduces energy for temperature control. Wind, hydro, solar, and hydrogen are alternative energy sources.

Answer:

1. All of the above
2. All of the above (assuming all listed are alternative energy sources)