Please switch off lights
Palabras clave
please,
switch,
off,
light,
when,
leaving,
order,
blue,
white,
control,
regulation,
mandatory,
obligatory,
essential,
important,
necessary,
energy saving,
power,
electricity,
communication,
concept,
conservation,
design,
eco,
ecological,
ecology,
ecosystem,
energy,
environment,
environmental,
green,
icon,
illustration,
vector,
isolated,
pollution,
recover,
reusing,
recycling,
reduce,
renewable,
renewable energy
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