1. Which of the following statement is incorrect?
a) global temperature in the past 100 years has increased for about 0.5 C
b) IPCC predicted in 2001 that global temperature could increase as much as 4.5 C by 2100.
c) From pre-industrial revolution to current, CO2 in the atmosphere has increased by about 35%.
d) Power generation from nuclear fuel contributes most of CO2 released by human activities.
2. True or False
In the Bay Area, the storm runoff is treated in sewage treatment plants before it is released into the bay.
3. Which of the following statements is false?
a) Heat can lower dissolved oxygen.
b) Organic wastes reduce the amount of oxygen in the water supply.
c) Radioactive waste and toxins can be concentrated by biological amplification.
d) organic nutrients such as fertilizers have no adverse effects on aquatic ecosystems.
4. First generation pesticides were abandoned or outlawed because
a) they contain heavy metals like lead, mercury and arsenic
b) they exhibit both bioaccumulation and biomagnifications.
c) pest quickly developed resistances to these pesticides.
d) all of the above
e) a and c only
5. Asbestos is:
a) a known cause of heart disease.
b) toxic in low concentrations.
c) a human-made insulation material.
d) a natural material that does not burn.
e) none of the above are correct.
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