adult
blue
building activity
building exterior
built structure
caucasian ethnicity
child
cold temperature
construction industry
construction site
construction worker
danger
engineer
environment
environmental damage
equipment
factory
fuel and power generation
garbage
global warming
hardhat
industry
males
manual worker
men
natural disaster
nature
occupation
one person
outdoors
people
pipe tube
pipeline
pollution
protective glove
protective workwear
safety
shovel
sitting
sky
smiling
snow
technology
toxic substance
toxic waste
water
winter
work helmet
working