Question

1. the greenhouse gas produced from most landfills is

a) co₂
b) ch₄
c) o₃
d) n₂

Explanation:

Landfills produce methane ($CH_4$) as organic waste decomposes anaerobically. Methane is a potent greenhouse - gas. $CO_2$ is also a greenhouse gas but not the primary one from landfills. $N_2$ and $O_3$ are not the main greenhouse gases produced from landfills.

Answer:

c) $CH_4$