The PM Group focusses on solving immediate and near-term environmental (health and ecosystems impacts from pollution), climate (non-CO2 greenhouse gases), and social (widening inequality gaps) problems in a cost-effective way, providing support to policymaking at local and regional scales.

The PM Group addresses sustainability challenges in the near and long term through an improved understanding of the multiple benefits of policies and their distribution across society. The group has a strong focus on the development of new approaches for multi-sectoral policy interventions to manage pollution across different media (air, water, and soil) at various scales to address near-term concerns and enable long-term transformations and their public support towards a sustainable future. In particular, the group endeavors to enhance the systems perspective approach to address and explore issues such as the interactions and environmental impacts of pollution; assessment of sources of non-CO2 greenhouse gases; mitigation opportunities; approaches to address nutrient and material cycling; options for more equitable solutions; and improved methods for estimating the health and economic benefits of policy interventions. 


Tanker at sea, aerial view. Large blue and white ship in the bay at sunset

Finding solutions to pollution caused by shipping in Europe (EMERGE)

Photo 260785013 © Mirko Kuzmanovic |

Development of a global integrated assessment modeling system for climate-air pollutants management focused on Northeast Asia (GUIDE)

Photo 260785013 © Mirko Kuzmanovic |

Development of a collaborative, integrated management framework to improve future air quality in Northeast Asia (AQNEA)

Beige and colored pawns grouped together

Exploring National and Global Actions to reduce Greenhouse gas Emissions (ENGAGE)


Jens Borken-Kleefeld profile picture

Jens Borken-Kleefeld

Senior Research Scholar (PM)

Wolfgang Schöpp profile picture

Wolfgang Schöpp

Guest Senior Research Scholar (PM)

Peter Rafaj profile picture

Peter Rafaj

Senior Research Scholar (PM, IACC)

Keywan Riahi profile picture

Keywan Riahi

Program Director and Principal Research Scholar (ECE); Principal Research Scholar (IACC, PM, S3, TISS)


Gas flaring from oil production in Siberia

16 November 2022

The need for rapid methane mitigation

Human-driven methane emissions account for nearly 45% of current net warming. The Global Methane Assessment 2030 baseline report, issued by the Climate and Clean Air Coalition and coauthored by IIASA researcher Lena Höglund-Isaksson, evaluates the progress of global reduction efforts. If the world is to keep global temperature rise below 1.5° and 2°C targets, swift action is needed.
Air conditioning units on a building

16 August 2022

Propane — a solution for more sustainable air conditioning

Current severe heatwaves that will likely increase in severity and frequency in the future are driving a rise in the use of air conditioners, threatening the environment with their high energy consumption and refrigerants with high warming potential. A new study finds that switching to propane as a refrigerant could lessen the global temperature increase from space cooling.


13 June 2023 Vienna, Austria

Vienna Energy Forum 2023


28 November 2022

Improving energy efficiency in Latin America’s dairy sector

Options Magazine, Winter 2022: A new study provides ways to combine efficient energy solutions with comprehensive waste management to make the Latin American dairy sector more sustainable.

24 November 2022

Charting fair pathways to climate neutrality

Options Magazine, Winter 2022: Equitably sharing the costs of mitigation is vital to ensure a just transition to a net-zero world. By calculating the impact of national policies on global emissions and exploring different effort-sharing schemes, the ENGAGE Project is at the forefront of developing feasible solutions.
Science into policy

12 October 2022

Targeting methane

Countries are coming together to try and control this elusive greenhouse gas, with the help of IIASA research.
Methane gas bubbles trapped in frozen water at Lake Baikal, Siberia, Russia.