Qatar's National Vision 2030 has made investment in renewable resources a major goal for the country over the next two decades. Qatar pursues a vigorous programme of "Qatarisation", under which all joint venture industries and government departments strive to move Qatari nationals into positions of greater authority. Growing numbers of foreign-educated Qataris, including many educated in the US, are returning home to assume key positions formerly occupied by expatriates. To control the influx of expatriate workers, Qatar has tightened the administration of its foreign manpower programmes over the past several years. Security is the principal basis for Qatar's strict entry and immigration rules and regulations.