In literature, several core studies have addressed the effects of industries in general, and the investments in Qualified Industrial Zones (QIZ) on the environment, adding up to the pollution risks resulting from these investments. What distinguish this study is that it dealt with investments in the QIZ in Jordan and its risks on the environment beside some other sectors that participate in polluting the environment such as the production sector represented by the GDP, the population sector, and the number of vehicles used during the study period that covered 1999 to 2017. This study used the ordinary least squares (OLS) method to examine the impact of investments in QIZ on the quality of the environment and its imbalances. It’s found that there is a clear negative effect of investments in the QIZ on the environment quality in Jordan in addition to the negative impact that is not less risky on the environment created by the other sectors.

The research aims to identify the impact of tax revenues on the growth of the gross domestic product (GDP) in Jordan during the period 2000-2018. The research reaches a set of results, which is that the greater the value of tax revenues by one unit, the greater the value of the GDP in Jordan by 7.257 units during the same period. There is also a positive effect of tax revenues on the growth and increase of the GDP in Jordan, however, there is no common integration between tax revenues and the GDP in Jordan. Moreover, there is a correction from the short term to the long term and there is an effect of the long-term correction of the relationship between tax revenues and the GDP during the study period. The study recommends the need to work to facilitate the procedures for individuals to pay taxes through modern technological means, work to develop and simplify tax services and raise the level of transparency in tax dealings with all individuals, the need to make amendments to the tax law in order to match the living conditions of individuals and achieve the highest efficiency in collecting due taxes, increasing tax exemptions that are offered to foreign investment to encourage them for investments in all economic, commercial, service and industrial fields in Jordan, working to diversify sources of income for the Jordanian economy and not to rely entirely on tax revenues as a primary source of income.