Recommended contributions are as agreed by the Executive Body . Abbreviations : ICP F = The International Cooperative Programme ( ICP ) on Assessment and Monitoring of Air Pollution Effects on Forests ; ICP W = ICP on Assessment and Monitoring of Effects of Air Pollution on Rivers and Lakes ; ICP M = ICP on Effects of Air Pollution on Materials , including Historic and Cultural Monuments ; ICP V = ICP on Effects of Air Pollution on Natural Vegetation and Crops ; ICP IM = ICP on Integrated Monitoring of Air Pollution Effects on Ecosystems ; ICP M & M = ICP on Modelling and Mapping of Critical Levels and Loads and Air Pollution Effects , Risks and Trends ; Health = the Joint Task Force on the Health Aspects of Air Pollution ; CIAM = Centre for Integrated Assessment Modelling .