RESEARCHERS from the University of York have contributed to a major United Nations pollution study.

The university’s Stockholm Environment Institute helped assess how to reduce the impact of black carbon and tropospheric ozone, and the risks to climate, human health and crop yields if political action is delayed.

Black carbon and tropospheric, or ground-level, ozone are known as short-lived climate forcers, and the United Nations assessment hopes to help link knowledge to action and policy, to provide a scientific basis for political decision-making.

A team of researchers at the Stockholm Environment Institute, led by Dr Johan Kuylenstierna, co-ordinated and helped to write the assessment.