Adatabase speeds up the sharing of scientific knowledge by:

by assembling large amounts of information in a single location

Explanation:

Database are organized and related information sets, consisting of columns and rows. In other words, a database is a set of information gathered in one place. For this reason, databases accelerate the sharing of scientific knowledge, because when a student, or a scientist needs information for his scientific work, he can access a database where all information will be gathered in one place.

Explanation:

Fracking is the introduction of substances into a formation in order to increase they pore pressure and to increase natural drive of hydrocarbons.

Fracking has several environmental issues associated with it;

Fracking leads to air pollution in case of blowout of gas pressure in formations, particles and dusts can become blasted into the environment. Proppants in fluids channeled into formations can lead to ground water contamination. In areas where fracking is done, there might be an exposure to harmful chemicals. Destruction of the natural habitats of animals.