NASA Chief Michael Griffin has sparked controversy by questioning the urgency of addressing global warming, stating that while he acknowledges a trend of global warming, he does not view it as an immediate problem. He argues that assuming the current climate is optimal is an arrogant position and suggests that humans cannot control climate change. Griffin's comments have drawn criticism from the left and support from the right, with some asserting that rapid climate changes could lead to catastrophic consequences. A recent NASA study contradicts Griffin, indicating that human-made greenhouse gases are nearing critical tipping points. The debate highlights differing perspectives on the role of science and policy in addressing climate change.