Question

landfills do have some disadvantages. which of the following is a disadvantage of landfills? they can be used forever as the trash breaks down quickly. they produce no foul smells and are usually visually appealing. they are cheap to build and are very easy to maintain indefinitely. methane, carbon dioxide, and leachate pollution can occur.

Explanation:

Landfills can have environmental issues. Methane (a greenhouse gas), carbon dioxide (also a greenhouse gas), and leachate (liquid that can contaminate soil and water) are all negative aspects. Trash in landfills does not break down quickly (so the first option is wrong). Landfills often have foul smells and may not be visually appealing (so the second option is wrong). They are not cheap to maintain indefinitely (so the third option is wrong).

Answer:

Methane, carbon dioxide, and leachate pollution can occur.