Time is running out

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Hourglass with Landforms — Black

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Hourglass with City and Ice

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Deforested Lungs — Green

1920 × 1080

Green Planet Fragment

1680 × 1050

White Silhouette on Clock

1920 × 1200

Birds Flying in Stormy Sky — Gray, Dramatic

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Open Pocket Watch — White, Dramatic

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Floating Green Island — Serene

1280 × 1024

Woman on a Planet

1024 × 768

Hands Holding Planet Earth — Blue, Peaceful

1024 × 768

Penguin in Alley

1920 × 1080