Providing temporary use of online non-downloadable software; providing temporary use of on-line non-downloadable software for linking, aggregating and harmonising carbon credit data from project registries; providing temporary use of on-line non-downloadable software for tracking carbon credits; data authentication via blockchain technology; providing temporary use of online, non-downloadable computer software for use in accessing blockchain technology; data cryptology services; application service provider [ASP] services; cloud computing services; computer software design services; computer software maintenance services; computer software programming services; computer programming for data processing; software as a service [SaaS]; platform as a service [PaaS]; hosting of databases; development of systems for the processing of data; development of systems for the transmission of data; design and development of software for database management; programming of software for database management; preparation of technical projects, technical research and consultancy services in the field of carbon offsetting; providing scientific information, advice and consultancy relating to carbon offsetting; advisory services relating to environmental protection; setting of quality standards; energy auditing; research in the field of environmental protection; hosting of computerized data, files, applications and information; integration of computer systems and networks; quality accreditation services, namely, setting standards related to carbon and environmental off-sets, and greenhouse gas emission reductions and removals for the purpose of accreditation; providing temporary use of online non-downloadable software for use in electronically trading, storing, sending, receiving, accepting and transmitting carbon or environmental assets including digital cryptocurrency assets, in the field of emission reduction credits, carbon dioxide and other greenhouse gas emission credits, allowances, rights or offsets of others or offsets on behalf of offset producers; design of models and methodologies for testing, measurement, reduction, verification and offsetting of carbon and/or greenhouse gas emissions and footprints and change in such emissions and footprints over time; certification of data via blockchain technology