Would shutting off the main power source from all outlets help a company in saving electricity and becoming more environmentally friendly?

Yes , specially when they let electrical devices work after the working hours, which consumes energy and increases emission, and hazzards

Any electrical device that has an external power supply connected to it will still use electricity while powered off. Such as cellphone chargers, computer speakers, any of those electrical devices with a cubed power supply on it. Also any electrical appliances that have a clock, LED, light, or LCD panel on it will also still use electricity while turned off. Such as microwaves, coffee makers, TVs, VCR’s, DVD players, etc. Also any devices that have a standby or sleep power modes will still consume electricity. Most TV’s and set top cable boxes never actually turn off, they just go into a standby mode. Computer monitors and computers are the same. Most computers will still keep power to the motherboard for different functions such as ethernet cards/network cards, modems, USB hubs, etc.

YES, it dimish the electrical passive losses due to non connected loads circuit intrinsic resisntances.

Make sure switch of all non essential office  equipments befor leave for the day.A photocopier left on overnight wastes enough energy to produce 1500 copies. It can save energy and becoming more environmentally friendly.

Yes, the energy sources used produce negative results that lead to pollution of the environment when they are burned, especially traditional sources of fuel such as oil and gas, and the products of burning these substances from volatile fumes, smoke and gases such as carbon dioxide, which in turn helps to increase the phenomenon of environmental pollution and lead to warming Earth

No , to be enviromentally friendly company should have selective switches and turn on and off based on customer , to save electrical energy company suppose to use high efficient machinnes and should have capacitive loads 

Yes because most office equipment such as computers, TV and similar equipment does not really off completely, thier mother board still consumes electricity. In a similar manner, most equipment that has clock and other intricate equipment still consumes electricity to keep this equipment on while the power is off. Therefore shutting off the main power supply source from all outlets help a company in saving electricity and become more environmentally friendly

No. Company must use electricity and avoid wasting of it

femtsoft.com or hardsofts.com or http://pec.org.pk. Because it disconnects the current flowing in the power cables and the power socket in this way reducing consumption of electricity and it also reduces noise and Electromagnetic Interference, it is also environementally friendly as reduction of any type of noise is environmentally friendly. 

True.....Only in Periods when a company is not productive.

All Electrical loads or machines needs to be switch off when not in use or during unproductive time for the company to save on energy usage and Emissions.

Yes, disconnecting power will lead to saving enegry on long run