The issue focused on research studies that researchers say show significant scientific evidence that climate change is causing climate change. Scientists say climate change is changing the climate in ways that scientists don't fully understand. Scientists say climate change is causing climate change. Scientists say climate change is causing climate change. Scientists say climate change is causing climate change. Scientists say climate change is causing climate change. Scientists say climate change is causing climate change. Scientists say climate change is causing climate change. Scientists say climate change is causing climate change. Scientists say