An example of a grad-school level question?
Which is a problem with using wind turbines to produce energy?

An example of a grad-school level question?
Populations living in one place form a

An example of a grad-school level question?
Louis Pasteur created a process that reduced the amount of bacteria in milk. How does this process most likely benefit people?

An example of a grad-school level question?
Many cars are equipped with a catalytic converter, a device that helps remove hydrocarbons and oxides from car exhaust. As a result, this device helps to