According to the passage, people are involved in terrorism because of: 

Former Indian President and eminent missile technologist Mr. APJ Abul Kalam said that sustainable economic growth and prosperity can help a country reduce the risk of terrorism-one of the most pressing problems now troubling different corners of the world. "People get involved in terrorism out of frustration and failure to meet their economic needs," he said while on tour in Dhaka. Only a sustainable economic development of a country can at a time when the world is conducting a ruthless "War on terrorism." Addressing an interactive programme with leading businessmen, professionals and entrepreneurs, Mr. Kamal suggested finding out the root cause of terrorism and looking for proper remedial measures. "The higher the economic growth, the lower will be incidents of terrorism," he told his audience.