The correct answer is:
Effect
Volunteers changed their goal to planting a trillion trees.
Explanation:
Crowther's research had a significant impact on the Billion Tree Campaign. Upon discovering that fifteen billion trees are destroyed each year, Felix and his volunteers realized that simply planting a few billion trees would not be enough to address the issue effectively. As a result, the volunteers changed their goal to planting a trillion trees, aiming for a much larger scale of reforestation to combat the problem of deforestation and tree loss. This change in goal was directly influenced by Crowther's findings, highlighting the importance of large-scale efforts in combating environmental challenges.
