MUMBAI: One of India’s premier outdoor advertising agency - Global Advertisers - revealed that it has witnessed promising growth in the outdoor advertising sector in 2013 due to several factors likes Lok-Sabha elections, new launches in telecomm, FMCG, Automobile etc. Global Advertisers MD Sanjeev Gupta said: “We believe that the future of out-of-home lies in 3Is-innovation, infrastructure and investment”.