42 Design and development of computer software, websites and mobile apps; hosting of software, websites and online portals; software and website support and maintenance services; the provision of software as a service (SaaS); the provision of software as a service (SaaS) featuring software in the field of advertising, marketing and social media; the provision of software as a service (SaaS) featuring software in the field of carbon dioxide and greenhouse gas emissions monitoring and calculation and carbon reduction and carbon offsetting; scientific and technological research services in the fields of carbon dioxide and greenhouse gas emissions and carbon reduction and carbon offsetting; scientific and technological consultancy, information and advisory services in the fields of carbon dioxide and greenhouse gas emissions and carbon reduction and carbon offsetting