What are two different ways whereby people can compost?

1. Aerobic Composting: This method involves providing oxygen to the compost pile to facilitate the decomposition process. Oxygen helps aerobic bacteria and other microorganisms to break down organic matter quickly, generating heat and releasing carbon dioxide and water vapor. Aerobic composting can be done in various ways, including:

- Composting bins or piles: These are typically used in backyard composting. Organic materials are added to a compost bin or pile and turned regularly to aerate the mixture.

- Compost tumblers: These are rotating containers that compost organic matter quickly and efficiently. They provide aeration by tumbling the materials regularly.

2. Anaerobic Composting: This method involves composting in the absence of oxygen. Anaerobic bacteria and other microorganisms break down organic matter without oxygen, producing biogas (mainly methane and carbon dioxide) and other byproducts. Anaerobic composting is typically used in large-scale commercial composting facilities or biogas digesters.