We need lots of energy to do the things we want to do: keep our houses warm, drive cars, run computers, grow and harvest food. there are many sources of energy. one source of energy we rely on is nonrenewable. that means once it is gone, there will not be any more for man to use. which natural resource is a nonrenewable source of energy? a) oil b) sunlight c) water d) wind

thats not even an aswer choice

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.

to figure the total magnification of an image that you are viewing through the microscope is really quite simple. to get the total magnification take the power of the objective (4x, 10x, 40x) and multiply by the power of the eyepiece, (usually 10x)