Answer:
good: knowledge bad: anxiety
They have forever changed the modern schooling system and helped to build basic moral guidelines onto how to run/operate a school in a correct manner
<span>First a science fair requires projects. They should be a diverse group of experiments and demonstrations. Second, the students should be present and close by their project so they can explain their work. The third important component of a successful Science Fair is community mentors to act as judges. The judges should interact with the students, make fair decisions, and spark interest in science.</span>
D hope this helps---------
I'm not an expert on this but I'm speculating "fracking"
Which uses high water pressure to extract the coal.