1.linux is less on resources i.e., it uses less CPU,MEMORY which means power consumption is less.
on an average windows 7 consumes 600MB of RAM,but,linux uses only 200MB means linux consumes 1/3rd of power that of windows consumes in case of RAM.
2.unlike windows,linux is 100% immune to viruses.so,we don't need an anti-virus which means we are not using our power,time to download an anti-virus,update it,scan the computer.
3.linux never hangs up,so,u need not...