Biochar application using recycled annual self straw reduces long-term greenhouse gas emissions from paddy fields with economic benefits.

Paddy fields are major contributors to agricultural greenhouse gas emissions. Applying ~1% biochar by topsoil weight (high single, HS) effectively reduces greenhouse gas emissions from paddy fields, but long-term impacts are unclear. Here we present 8-year field experiments showing HS reduces CO equivalent per hectare by 59% and yields a net benefit of US$1,810 per hectare.

Recycling packaging waste from residual waste reduces greenhouse gas emissions.

Recycling packaging waste from residual waste can help alleviate resource pressure. However, its environmental and economic benefits remain uncertain, which hinders the widespread application of packaging waste recycling. This study assessed the greenhouse gas (GHG) emissions, environmental impacts, and external costs of a government-recommended technology for recycling packaging waste by applying Life Cycle Assessment (LCA) and Chintax model.