After being decomposed, probiotics are added to the waste to make fish feed.

Plastic varieties can take centuries to decompose into particles, while newer versions are designed to quickly biodegradeFor bubble tea buff Ding Yi, it's the third time this week that his drink tasted like wet cardboard, with the culprit being a paper straw.

The material can be decomposed into carbon dioxide and water and produced from plant-based feedstock such as corn.

"Although we only use plastic straws for a few moments, it can take hundreds of years for them to decompose.

However, plastics decompose extremely slowly in soil.

When dumping plastics into landfills, they usually decompose into nano-sized plastic particles.

Organic waste such as food scraps, animal waste, and agriculture crops can be decomposed to produce a mixture of methane and carbon dioxide.

Biomass is often burned to generate power rather than being decomposed into biogas in China.