Earth observation (EO) is the process of gathering information about the Earth from a range of sensors to provide monitoring data at a range of scales. This POSTnote outlines some of the environmental uses and benefits of EO data, the potential opportunities from advances in relevant technologies and challenges facing the effective use of EO data.

The unique properties of engineered nanomaterials are beneficial to a range of industries. However, uncertainties in assessing their potential health and environmental risks could hinder their safe use. This POSTnote summarises the current regulation of nanomaterials and highlights potential future directions for regulatory testing approaches.