Question: Which of the following statements concerning greenhouse warming or climate change is FALSE? Group of answer choices High populations and national boundaries not only raise the risks from climate change but can also complicate our response to climate change. Although a real agricultural greenhouse warms by preventing air convection, greenhouse warming is instead due to gases that absorb radiation. Although water vapor is the main greenhouse gas in our atmosphere, human activities more directly affect CO2 and methane levels. Greenhouse gases in the atmosphere trap incoming solar (Sun) radiation before it reaches the Earth's surface to warm the climate. One concern about present climate warming is that climate systems have tipping points that can result in significant long-term climate changes.