What is one of the main gases produced in landfills?

• Radon

• Methane

• Oxygen

• Nitrogen

How can leachates be prevented from entering groundwater?

• By increasing landfill size

• By using clay caps

• By using plastic liners

• By adding more waste

Which of the following is banned from municipal solid waste (MSW)?

• Food waste

• Paints

• Paper products

• Glass bottles

What role do anaerobic microbes play in landfills?

• They prevent gas emissions

• They break down organic matter

• They produce oxygen

• They help in waste collection

What is a common method for reducing waste in landfills?

• Dumping

• Composting

• Landfilling

• Incineration

What is the primary purpose of a landfill gas collection system?

• To capture methane

• To prevent fires

• To generate electricity

• To reduce odors

Plastic litter in the ocean:

• Collects in ocean regions called gyres

• Breaks down slowly in sunlight

• Can be mistaken by food by marine organisms

• All of the above