The Iowa Energy Center announced it has extended its grant application deadline to June 30 for renewable energy and energy efficiency projects in the areas of research, demonstration and commercialization. The Ames-based center said its new three-tiered model, which offers Planning, Opportunity and Matching Grant programs, is aimed at making Iowa proposals more competitive in soliciting additional external funding by providing free industry-specific feedback on submitted proposals. For more information, visit www.iowaenergycenter.org or contact the center at iec@iastate.edu .