Re-order paragraphs

Instruction:
The text boxes in the left panel have been placed in a random order. Restore the original order by dragging the text boxes from the left panel to the right panel.
Greener Future
d) After all, humans rely on the natural environment to provide everything from food and water to the air we breathe.
b) But our climate is changing fast and this poses a serious threat to the future of our life on planet Earth.
a) A healthy and stable climate is vital to sustaining our life on earth.
c) It's time for us all to take action and create a cleaner, greener future.
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