How to pronounce “chemical energy” in English

the chemical energy which is what we're trying to harness stored in the molecules of gas and coal and oil comes

It's the chemical energy currency.

And if you want to extract the chemical energy in the sugars from cellulose, you need a different chemical process, which is called cattle-ranching, where you feed it to cows.

What would be the equivalent chemical energy in gallons per hour?

During summer they will collect a lot of energy through photosynthesis and store this as chemical energy in the root, in the form of carbohydrates--

Just like energy, you can convert electrical energy into mechanical energy, or gravitational energy, or chemical energy.