NASA's primary focus is on space exploration and research, their efforts have resulted in numerous benefits for society, including advancements in technology, health, and environmental research.

NASA's contributions to the world include the development of technologies such as GPS, medical imaging, and solar energy. NASA has also conducted research on climate change, which has helped to advance our understanding of the environment and the challenges we face as a global community.

Furthermore, NASA has inspired people around the world with their achievements, encouraging young people to pursue careers in science, technology, engineering, and math (STEM) fields. NASA has also played a vital role in international cooperation, collaborating with space agencies from around the world on various projects and missions. So in the end we can say that NASA is necessary for the world.