Aerosol particles can interact with radiation and hence provide a resistance to it which manifests itself as a non-zero optical depth. This can act as heat sinks for the incoming radiation and can act as a heat source for the air around it and thus heating it. Such changes in the radiation budget are incorporated in climate change studies as radiative forcing. IPCC (Intergovernmental panel for Climate change) every few years lists the radiative forcing of various atmospheric species. Carbon dioxide and other greenhouse gases secure the top positions with high confidence levels in this table. Aerosols on the other hand, are marked with very high uncertainties & very low confidence. In this talk I will discuss about radiative forcing especially in context of these aerosols, highlighting their importance in Himalayan region. I will also provide a description of the work that we have undertaken targeting carbonaceous aerosols.