What measurement unit describes the amount of energy food contains?

Which of the following choices is not an effective solution to the energy waste related to inefficient lighting? a. using low-pressure sodium lighting sources b. pointing lights on billboards and street signs upward c. placing light sources on time controls d. shielding light to direct it downward

For this question look at the hydropic diagram water that is heated by the sun evaporates. select the number that represents it.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?