Environmental issues.- Deep-sea mining and environment - an introduction.- Environmental issues of deep-sea mining - a global perspective.- Environmental impacts of nodule, crust and sulphide mining - an overview.- Towards an ecosystem approach to environmental impact assessment for deep-sea mining.- Technologies for Safe and Sustainable Mining of Deep-Seabed Minerals.- Environmental impact assessment.- Assessment of deep-sea faunal communities - indicators of environmental impact.- Long term monitoring of environmental conditions of benthic impact experiment.- Metal mobility from hydrothermal sulfides into seawater during deep seafloor mining operations.- Mining in hydrothermal vent predicting and minimizing impacts on ecosystems with the use of a mathematical modeling framework.- Ecotoxicological bioassay using marine algae for deep-sea mining.- Environmental data standardization and application.- New techniques for standardization of Environmental Impact Assessment.- Environmental factors for design and operation of deep-sea mining system - based on case studies.- Environmental management.- Environmental Policy for Deep Seabed Mining.- Ecosystem approach for management of deep-sea mining activities.- Improving environmental management practices in deep-sea mining.- The development of Environmental Impact Assessments for deep-sea mining.- Protection of the marine The international and national regulation of deep seabed mining activities.- Economic Considerations.- Chapter 18: Deep sea natural putting deep see economic activities into an environmental context.- Review of mining rates, environmental impacts, metal values and investments for polymetallic nodules mining.- Techno-economic perspective on processing of polymetallic ocean nodules