According to a new report released on Monday by the Intergovernmental Panel on Climate Change, nations must take immediate and drastic action to move away from fossil fuels to prevent the planet from dangerously overheating beyond a critical threshold for global warming, which is expected to occur within the next decade.
The report offers the most comprehensive understanding to date of the planet's changing ways, and it warns that as humans continue to burn coal, oil, and natural gas, global average temperatures will rise to 1.5 degrees Celsius (2.7 degrees Fahrenheit) above preindustrial levels by "the first half of the 2030s." This number is of great importance in global climate politics because, under the 2015 Paris climate agreement, nearly every nation agreed to "pursue efforts" to limit global warming to 1.5 degrees Celsius.
Beyond this point, scientists say that humanity will have a significantly harder time dealing with the impacts of catastrophic heat waves, flooding, drought, crop failures, and species extinction. However, the Earth has already warmed an average of 1.1 degrees Celsius since the industrial age, and with global fossil-fuel emissions setting records last year, the goal of limiting global warming to 1.5 degrees Celsius is rapidly becoming unattainable.
According to the new report, there exists a final opportunity to change direction. However, this would necessitate immediate cooperation among industrialized nations to significantly reduce greenhouse gas emissions by roughly 50% by 2030 and ultimately cease adding carbon dioxide to the atmosphere by the early 2050s. By taking these two measures, the world would have a probability of about 50% to restrict warming to 1.5 degrees Celsius.
The report warns that any delays, even by a few years, would render the goal unachievable and lead to a hotter and more dangerous future. This comes at a time when the two largest polluters in the world, China and the United States, are still approving new fossil fuel projects. China issued permits for 168 coal-fired power plants last year, while the Biden administration recently approved the massive oil drilling project, Willow, in pristine federal land in Alaska.
According to the report, which was approved by 195 governments, existing and planned fossil fuel infrastructure such as coal-fired power plants, oil wells, factories, and vehicles worldwide will generate enough carbon dioxide to increase global temperatures by roughly 2 degrees Celsius this century. To prevent this outcome, many of these projects will need to be canceled, retired early, or cleaned up.
Many scientists have noted that surpassing the 1.5-degree threshold does not equate to a doomed future for humanity. However, each incremental rise in temperature is expected to heighten the severity of risks faced by people worldwide, including lethal heatwaves, malnutrition, and water scarcity.
The difference between a 1.5-degree and 2-degree temperature increase could mean tens of millions more people globally being exposed to life-threatening heatwaves, water scarcity, and coastal flooding. While coral reefs and summer Arctic sea ice might still exist in a 1.5-degree world, they are likely to disappear in a 2-degree world.
According to scientists, the warming process will mostly cease when humans stop releasing heat-trapping gasses into the atmosphere, referred to as "net zero" emissions. The speed at which nations reach net zero will determine the ultimate level of global warming. Analysts estimate that under the current policies of national governments, the planet is expected to warm by 2.1 to 2.9 degrees Celsius this century.