**6. The challenges of technology in the contemporary world scene**

It is known that sustainable development is volatile and requires a complex series of complementary policies, due to the uncertainty of the generation and distribution of knowledge of C & T [51]. In addition, there is the lack of appropriate instruments or the inability of scientific models to measure the environmental impacts. [72]. According to [73] the relationship between technology and the environment occurs in an uncertain way, being very difficult to predict which current and future impacts can be brought by technological innovation. The generation of new "clean technologies" becomes a challenge. At this point, the political factor should be relaxed, because the environmental goals of short and long term may not be compatible, as well as the policies in force, with innovative attitudes. From the literature reviewed, national and international papers and documents were analyzed, showing the main challenges identified by theorists, researchers and technicians, as being the current problems that the technological development faces worldwide. What we were able to check is that sustainability and environmental conservation are issues prioritized in the material analyzed ([2, 3, 7, 8, 34, 44, 45, 50, 56-60, 67, 74-89]).
