earth

day

world

planet

map

life

save

environment

green

illustration

nature

global

preservation

blackboard

chalk

doodle

eco

care

chalkboard

ecology

holiday

environmental

home

peace

continent

black

help

drawing

safety

humanity

sketch

mainland

school

geographic

education

drawn

class

male

hands

palms

people

covering

protection

man

land

geography

conservation