evidence: NASA's Global Climate Change Website [...] NASA’s global climate change website, and its vital signs section, document what a 1-degree Celsius temperature increase has already done to our planet. The impacts of global warming are being felt everywhere, from rising sea levels to more extreme weather, more frequent wildfires, and heatwaves and increased drought, to name a few. Because our society has been built around the climate Earth has had for the past approximately 10,000 years, when it changes noticeably, as it has done in recent decades, people begin to take notice. Today, most people realize Earth’s climate is changing. A December 2018 report by Yale and George Mason Universities found that seven in 10 Americans think global warming is happening, with about six in 10 saying it is mostly caused by humans. We live in a world bound by the laws of physics. For example, at temperatures above 0 degrees Celsius (32 degrees Fahrenheit), ice, including Earth’s polar ice sheets and other land ice, begins to melt and changes from a solid to a liquid. When that water flows downward into the ocean, it raises global sea level.