Dr.

Chen LIU

The COVID-19 outbreak has posed significant challenges for waste management, waste recycling and the circular economy around the world. This waste is not only medical and infectious waste but also general waste such as food waste and plastic waste (UNEP, 2020). Challenges include changes in lifestyle, consumption habits, blocked supply chains...

Marine plastic litter, mostly comprising single-use plastics, has been recognised as one of the world’s most urgent environmental concerns, and Vietnam has been ranked as one of the top five countries polluting the ocean with plastic waste. This paper examines Hanoi as a case study on single-use plastic by households, investigating the daily...

The issue of food waste, especially in developing economies, is a puzzle. Hanoi was selected as a case study to examine the current situation of food waste generated by consumers through daily habits/practices and to evaluate options for preventing and reducing food waste at the policy level through a literature/policy review and interview-style...

This catalogue has been produced for the workshops and home experiments organised by the 1.5ºC Lifestyle Project. A decarbonised lifestyle to reduce the carbon footprint (CFP), including CO₂ emissions plus CO₂ equivalent of the other greenhouse gas (GHG) emissions, per Japanese person from 7,600 kg per year (2015) to 2,500 kg per year (about 1/3)...

Mechanical-Biological Treatment (MBT) is a pretreatment method used before landfilling to reduce the amount of waste to be disposed.3 MBT literally means the combination of mechanical crushing and sorting processes and biological treatment (e.g. aerobic and anaerobic decomposition) (Fig. 2). The advantage of MBT in terms of appropriate waste...

気候変動や生物多様性とともに、資源効率性・循環経済が、国際的な環境課題として主流となりつつある。 SDGs 指標においても国内物質消費 (DMC) 、資源生産性 (GDP/DMC) 、リサイクル率・量（目標 12 ）が挙げられているが、リサイクル率については、廃棄物の定義や算出方法の差異が課題として指摘されることが多い。本稿では、国際的に日本の値が比較的低いと議論されている都市廃棄物 (Municipal solid waste: MSW) のリサイクル率を取り上げ、欧州連合（ EU ）との比較を行った。加えて、循環経済政策の改善を進めているアジア各国のリサイクル率の事例も考慮に入れ、国際比較可能性についても検証を行った。

世界の食料の 3 分の 1 が廃棄されている。国連加盟国によって採択された SDG 12.3 では、食品ロス（ food waste; 廃棄または再利用するために食物サプライチェーンから取り除かれた食物及び食物の食べられない部分）削減の目標として、「 2030 年までに小売・消費レベルにおける世界全体の一人当たりの食料の廃棄を半減させ、 収穫後損失などの生産・サプライチェーンにおける食品ロスを減少させる」 ことが定められた。先進国における食品ロスの発生は半分以上が消費段階にあることが確認され、消費者から発生する食品ロスに関する研究は増加している。一方、アジアの新興都市では急速な都市化、中間層の急増、食生活の欧米化、近代的小売普及などの要因は、食品ロスの発生に大きく影響を与えるが...

This Composting Guideline was prepared by the researchers from the National Institute for Environmental Studies (NIES) and the Institute for Global Environmental Strategies (IGES) focusing on the introduction of composting projects based on source separation of organic waste and aerobic fermentation at plants for Municipal Solid Waste (MSW)...

According to the World Bank (2018), global annual waste generation is expected to jump from 2.01billion tonnes in 2016 to 3.40 billion tonnes over the next 30 years, and this trend is especially true in developing countries in Asia and Africa. This suggests that there has been very little success in reversing the trend of the increased generation...

This paper selected Hanoi as a case study to clarify the impact of daily lifestyle on food waste generation, as well as to evaluate policy options to prevent, mitigate and reduce food waste generation by consumers in Hanoi. Based on a questionnaire survey, the current situation of household FW generation was examined and the main reasons for FW...