This document summarizes the key issues related to global warming. It states that the burning of fossil fuels is increasing greenhouse gases and trapping heat in the atmosphere. This is causing sea levels to rise an estimated 1 meter by 2100 due to melting ice caps and glaciers, which could submerge many major cities. Global warming also threatens wildlife like polar bears as their Arctic sea ice habitat disappears. The document calls for actions to reduce carbon footprints to mitigate the effects of climate change.