Original sentence: It is similar to numerous existing ionospheric heaters around the world, and has a large suite of diagnostic instruments that facilitate its use to increase scientific understanding of ionospheric dynamics.Most scientists involved in aeronomy, space science, or plasma physics dismiss these fears as unfounded.Some controversy surrounds HAARP, many have expressed fears of it being used as a nefarious weapon.The High Frequency Active Auroral Research Program (HAARP) is a US Air Force, Navy and University of Alaska funded investigation to "understand, simulate and control ionospheric processes that might alter the performance of communication and surveillance systems" started in 1993 for a proposed twenty year series of experiments
Edited sentence: It has aroused some controversy for its alleged potential as a weapon or mind-control device, and among environmentalists for its effect on the atmosphere.Project HAARP (High Frequency Active Auroral Research Program) is a US Air Force, Navy and University of Alaska funded investigation to "understand, simulate and control ionospheric processes that might alter the performance of communication and surveillance systems" started in 1993 for a proposed twenty year series of experiments