Half a degree can make a world of difference
The average temperature of the planet has been rising since the 1700s and its Industrial Revolution. Three years ago, in 2015, 195 nations signed onto what is known as the Paris Accord. In it, they agreed to curb greenhouse gas emissions to limit that warming by 2100. The goal is not to let it exceed 2 degrees Celsius (3.6 degrees Fahrenheit) over preindustrial times. But a new report says there may be big benefits to setting an even lower target.