Some disadvantages of burning trash in waste-to-energy plants are that
a. it reduces volume by about 10 percent and it also pollutes the air.
b. the resulting smoke dissipates rapidly with few harmful particulates, but it also offers no opportunity forcogeneration due to the presence of plastics and metal.
c. only about 13 percent of solid waste is handled in this manner, the cost of building incinerators is expensive,and incinerators must meet much higher air quality standards than in the past.
d. it has proven to be not very valuable for cogeneration of electricity and it only reduces the volume of the yardwaste involved.
Question 2
The primary difference between Sunni and Shi'i Islam is
a. whether all Muslims have to make a pilgrimage to Mecca.
b. who should have succeeded the Prophet Mohammad following his death.
c. the amount one needs to submit to the Five Pillars of Islam.
d. whether or not the Prophet was divine.
e. how much Muslims should modernize.