The graph below shows the English sparrow population in an area over several years. In 1988, a large shopping mall was built in the area where the sparrows lived.

According to the information in the graph, how did this affect the sparrow population over a period
of time?
a. The population increased because humans fed the sparrows.
b. The sparrow population was unaffected by the shopping mall.
c. The population increased because predators were removed.
d. The sparrow population decreased because of habitat destruction.

Martha is writing a report on the landfill gases near her house. fill in the blanks to complete her report. use this table for calculations: residence time (t) mass (m) methane 8 years 4.3 × 1015 g landfill methane humans produce a huge amount of waste every day. landfills were designed to combat this large amount of waste by accumulating and disposing it. organic waste from landfills undergoes decomposition in the absence of oxygen, producing gases. methane gas is a large percentage of the gases emitted from landfills. if we consider a landfill a reservoir, the flow rate of methane is . methane has a longer residence time than co2, and it is a greenhouse gas that traps heat very effectively. therefore, methane the temperature of the reservoir.