earth

hour

world

globe

planet

save

environmental

concept

day

ecology

illustration

text

eco

global

environment

nature

event

energy

map

time

care

blue

green

holiday

electricity

international

lettering

message

conservation

continent

handwriting

letter

protect

word

protection

blackboard

chalk

doodle

chalkboard

ocean

black

drawing

humanity

sketch

mainland

rotate

geographic

class