1. A combination of factors made the 1984 accident in a storage tank at a Union Carbide plant in India almost ----.

2. In the opinion of most scientists, engineering does not ---- offer universally acceptable solutions.

3. Scientists suggest that huge amounts of greenhouse gases will be ---- into the atmosphere if rising temperatures cause the Arctic permafrost to melt.

4. Damage to the liver is the main health ---- for long-term heavy drinkers.

5. Health risks from pesticide exposure are probably small for healthy adults, but children, the elderly, and people with
compromised immune systems may be ---- to some types of pesticide poisoning.