in any ecosystem, land-based and aquatic, matter, in the form of atoms and molecules, is cycled among all organisms. organisms within every food web, have specific roles in continuing the cycle of nutrients.
in any food web, the organisms that are responsible for converting raw energy into usable chemical energy are collectively called while organisms that recycle the nutrients trapped in dead organisms are collectively called
a) producers; consumers.
b) producers; decomposers.
c) heterotrophs; consumers.
d) heterotrophs; autotrophs.

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.