Q: Fact 1: Using a car causes pollution. Fact 2: Air pollution Air pollution is a major threat to health. Given the two facts above, what can be a major threat to health? | OPTIONS:
- bicycling
- using a car
- smoking
- skateboarding
- viruses
- Dehydration
- influenza
- doctors
A: using a car

Q: Fact 1: Wiring requires an electrical conductor. Fact 2: Copper is a good conductor of electricity. Given the two facts above, what can copper be used in? | OPTIONS:
- reducing conducting
- heat
- boiling
- wiring
- not conducting
- removing conducting
- engines
- energy
A: wiring

Q: Fact 1: Burning wood is used to produce heat. Fact 2: Heating and air conditioning keep the building comfortable regardless of the temperature outside. Given the two facts above, burning wood is used to keep buildings what? | OPTIONS:
- comfortable
- closed
- homogenous
- warmth
- smokey
- cold
- staying warm
- freezing
A: comfortable

Q: Fact 1: Electricity sometimes is used for heating buildings. Fact 2: Hospitals incorporate most types of technical systems encountered in other types of buildings. Given the two facts above, what is electricity sometimes used to heat? | OPTIONS:
- space
- hospitals
- waves
- direct energy
- energy
- Light
- condensation
- clouds
A: hospitals