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6.A. - Page 32 of 251 <br />Impacts of Climate Change <br />City <br />Climate Science 101 <br />Impacts of Climate Change on Redwood City <br />on Redwood <br />Climate change presents one of the most significant challenges of our time. As levels of greenhouse gas (GHG) <br />emissions increase in the atmosphere, the Earth's climate system is being destabilized. GHG emissions are <br />invisible, and include carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and three man-made gasses: <br />hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulfur hexafluoride (SF6). <br />As more greenhouse gasses are trapped inside the Earth's atmosphere, more of the sun's energy is trapped as <br />heat, which means temperatures keep getting hotter. In fact, the world has already become nearly VF warmer <br />since 1880, and we're seeing extreme consequences because of it, including more intense storms, greater wildfire <br />risk, and rising sea levels. <br />Although we're already seeing impacts of climate change, there's a range of how relatively mild or devastating the <br />future impacts might be, depending on how aggressively we take action to address it (see Chapter 3: Impacts of <br />Climate Change, Future Projections section). Scientists have laid out four pathways, or scenarios, based on future <br />levels of GHG emissions. The pathways range from the very optimistic to the highly pessimistic. The strategies laid <br />out in this CAP are in alignment with the most optimistic pathway. For more information about the four pathways, <br />see Appendix B.4. <br />City of Redwood City Climate Action Plan 21 <br />337 <br />