The prime factors in desertification in the Sahel were a natural drought and ________
A) an increase in forest cover
B) overgrazing
C) fence building
D) tribal wars
E) deposition of desert sand
Answer: B
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Children in Pakistan work to support their families by processing e-waste to recover valuable metals. Which type of hazard is primarily represented by this activity?
A. cultural B. chemical C. biological D. lifestyle health
Ice cores provide a record of which of the following?
A. past temperatures B. past wind patterns C. past biodiversity D. past precipitation
The E-10 zone in the coastal erosion hazard mapping scheme is the zone in which erosion is predicted to happen over the next ________ time period
Fill in the blank(s) with correct word
The saying "the dose makes the poison" means that
A. Nearly anything can be toxic at some level B. Some things are more poisonous than other things C. Toxic materials are measured in doses of lethal amounts D. All things are equally poisonous at equal doses E. Almost nothing is toxic at low levels