Question

what is one potential environmental benefit of a well - managed landfill?
controlled methane gas capture for energy production
uncontrolled leachate leakage into groundwater sources
increased levels of waste odor and air pollution effects
increased concentration of landfill gas and solid waste

Explanation:

A well - managed landfill can capture methane gas (a potent greenhouse gas) in a controlled manner. This captured methane can be used for energy production, which is an environmental benefit as it reduces the amount of methane released into the atmosphere (where it would contribute to climate change) and also provides a renewable energy source. Uncontrolled leachate leakage (contaminated liquid from the landfill) is a negative environmental impact. Increased waste odor, air pollution effects, and increased concentration of landfill gas and solid waste are all negative aspects rather than benefits.

Answer:

controlled methane gas capture for energy production