adult
background
backpack
boy
caucasian
cell
child
company
current
delivering
ecology
electricity
energy
engineer
explain
factory
full
helmet
isolated
job
length
lift
male
man
manufacture
occupation
panel
people
person
photovoltaic
pointing
portrait
power
pupil
renewable
schoolboy
service
showing
solar
student
studio
sun
sunlight
teach
technology
uniform
white
work
worker
young