Research & information: general 91 Technology: general issues 86 Biology, life sciences 83 TJ Mechanical engineering and machinery 71 Marine biology 61 Ecosystems 56 fishery management 52 History of engineering and technology 49 Biodiversity 47 Ecological science, the Biosphere 45 TA Engineering (General). Civil engineering (General) 43 marine environment 41 Climate change 40 Research and information: general 40 Medicine and Nursing 39 Atlantic Ocean 38 VM Naval architecture. Shipbuilding. Marine engineering 36 marine ecosystem 36 marine policy 35 History of engineering & technology 32 biodiversity 32 COVID-19 31 governance approach 31 Oceanography 30 Science: general issues 30 sustainability 30 Environmental economics 29 Environmental management 27 Environmental science, engineering & technology 27 United States 27