To fight climate change, countries are turning to nature-based solutions like planting forests or growing energy crops. While these efforts help remove carbon dioxide from the atmosphere, they also affect how much water stays in the land. Trees and crops take in water and release it into the air, which can change rainfall patterns—not just nearby, but even in places far downwind. This study compares two future land-use scenarios: one where forests are widely planted, and another where energy crops are expanded. We use climate and land system models, along with a dataset that tracks how water vapor moves through the atmosphere, to study how these changes impact both carbon storage and water availability. We find that land-use changes can either improve or worsen the balance between carbon storage and water resources, depending not only on local changes but also on how they affect moisture flowing in from other regions. In fact, some areas experience drier conditions even if they themselves don't change much, due to what happens upwind. These results suggest we need to plan climate solutions with a full picture of both carbon and water impacts—not just locally, but across regional and even global scales.