The first theme shows what it looked like, if the annual emissions from cars in Los Angeles would form a big bubble instead of mixing into the air. That bubble would be hovering right over Downtown Los Angeles and would have a volume of about 1.9 billion cubic meters in the form and density of pure CO2. It would weigh 3.7 million metric tons.
The second theme shows the emissions from cars in New Delhi, India. The annual emissions from cars in New Delhi is around 6.19 million tons CO2 equivalent.
The title is a reference to Francisco de Goya's painting "El Coloso"