![](/nationalgeographic/trailblazer_may_2020/activity/718550/NationalGeographic_300017.512_0_1.jpg)
wetland
![](/nationalgeographic/trailblazer_may_2020/activity/718545/question_5.512_0_1.jpg)
forest fire
![](/nationalgeographic/trailblazer_may_2020/activity/718546/question_5_copy.512_0_1.jpg)
plants in water
![](/nationalgeographic/trailblazer_may_2020/activity/718542/b57hm3.512_0_1.jpg)
animals
![](/nationalgeographic/trailblazer_may_2020/activity/718547/GettyImages_1125633576.512_0_1.jpg)
plants on land
![](/nationalgeographic/trailblazer_may_2020/activity/718548/GettyImages_157313230.512_0_1.jpg)
burningfossil fuel
![](/nationalgeographic/trailblazer_may_2020/activity/718549/shutterstock_243783016.512_0_1.jpg)
soil
Carbon Source
Carbon Sink
Carbon Source
Carbon Sink
Carbon Source
Carbon Sink
Carbon Source
Carbon Sink
Carbon Source
Carbon Sink
Carbon Source
Carbon Sink
Carbon Source
Carbon Sink
Toomuchcarbondioxideintheatmospherecanbeharmfultothe planet.
Isthephotoshowingacarbonsourceoracarbonsink?Tapabuttonto answer.
Welldone!
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