For more than a century, the tendency in industrialized countries to link economic health with the production of greenhouse gases. Since the industrial revolution, a perfect correlation between CO2 emissions and global or regional growth, valid upward or downward, has been demonstrated.
In fact, it has been noted acutely during several world crises. Thus, in 1929, the rate of carbon dioxide released into the atmosphere fell during the Great Depression, where world GDP contracted by about 20%. It also dropped during the 2 World War, during the oil shocks of 1974 and 1979 and during the Gulf War in 1990.