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UI
Outline
Freeline
nature, Flower, plant
Black
512x512
Mixed
Handdrawn
Social Messaging & Productivity
environment, Leaf, eco
environment, recycle, ecology
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Education & science
Brainy Icons Free — 36 Science and Education Icons
hand-drawn, recycle, environment
64x64
chamomile, environment, green
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Gaming & gambling
Photorealistic
48x48 Free Object Icons
ecology, ladybird, lady
48x48