Kenya Nairobi Air pollution 1 CBD 1 Connectivity 1 Developing countries 1 East Africa 1 Food remittances 1 Food security 1 Migration 1 Nairobi [Kenya] 1 Nairobi [Nairobi (CNT)] 1 Sustainable transport 1 Traffic pollution 1 Urban household 1 Ventilation system 1 air quality 1 atmospheric pollution 1 developing world 1 policy approach 1 pollution effect 1 pollution policy 1 regulatory framework 1 sustainable development 1 traffic emission 1 traffic management 1 urban pollution 1 urbanization 1