The COBWEB project aims to crowdsource environmental data over 4 years to aid decision making. It will introduce quality measures and fuse crowdsourced data with reference data. The project involves several universities and organizations from the UK, Ireland, Germany, Greece and the Netherlands. It will work within the GEOSS framework and make data available through GEOSS. The project will address authentication questions and pilot access management federation technology to enable secure data sharing within GEOSS.