Enhanced Rock Weathering and Climate Mitigation: Prospects in Urban Farming 

As part of a study of enhanced rock weathering in tropical lowland soils in an agricultural setting we are embarking on an assessment of the role of ERW in urban farming scenarios. Here, we present an evaluation of key agricultural settings in which quantification may be best achieved. In the context of Singapore, which has an ambition of domestic production of 30% of its nutritional needs by 2030, this must include urban farming. We assess development of methods for geochemical analysis of cation mobility due to weathering in urban farming substrates. We have developed a matrix of key factors in enhancing soil and likely carbon drawdown; validation and testing of existing models. Finally, we conduct assessment of implications for agricultural productivity and economic viability.