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Reforestation involves restoring and planting trees in areas where forests once thrived but have been depleted due to agricultural expansion and urban development. Experts emphasize that natural climate solutions, including reforestation, can account for up to 30% of the efforts needed to combat climate change. Specifically, reforestation is the largest component of these solutions because trees are natural carbon sinks—they absorb carbon dioxide from the atmosphere, helping to reduce greenhouse gases.