A3: They form from the remains of ancient plants and animals over millions of years, so their formation rate is far slower than the rate at which humans use them.
When the sun finally rose, Leo closed his laptop. He never did find the static PDF, but as he walked into the exam hall, he realized he didn't need it. He wasn't just looking for the keys anymore; he understood how to power the house. 3 so you're ready for your own "final"?
: Energy obtained from flowing water. During generation, gravitational potential energy is converted into kinetic energy to turn turbines.