7. Though the wastes are pumped into porous rock, the industry claims the wells are
safe because
A subsurface heat purifies the waste
B they are beneath aquifers
C they are lined with steel
D their wastes are solid

rising temperatures because when water vapor in the air is cooled, it condenses. it turns back into a liquid and attaches to dust particles in the air. these very small water droplets group together to form clouds

well, i believe that the answer is 2. : 3

other quantities, called derived quantities, are defined in terms of the seven base quantities via a system of quantity equations. the si derived unitsfor these derived quantities are obtained from these equations and the seven si base units.