Fact 1: Creating wood-free paper does not require cutting down trees. Fact 2: Deforestation happens when people cut down forests or when trees are burned. Given the two facts above, creating wood-free paper can avoid what process?
OPTIONS:
- Using pulp
- Dehydration
- Deforestation
- erosion
- Physical weathering
- Using calender rolls
- Using chemicals
- contamination

Answer: Deforestation

Fact 1: Viruses cannot reproduce by themselves. Fact 2: Viruses Viruses are the smallest agents of disease. Given the two facts above, the smallest agents of what cannot reproduce by themselves?
OPTIONS:
- Pesticides
- bacteria
- Allergies
- fungi
- animals
- dangerous
- ferns
- disease

Answer: disease

Fact 1: Most carcinogens cause cancer by producing mutations in DNA. Fact 2: Smoke is full of carcinogens. Given the two facts above, what can cause cancer by producing mutations in DNA?
OPTIONS:
- maples
- PDAs
- A drug.
- copper
- coal
- CO 2
- smoke
- sponges

Answer:
smoke