Fig. 2. Carbon dioxide plumes from power plants and methane from landfill observed from space.

(A) Carbon dioxide plumes from emission stacks at two power plants in China (1571 ± 229 tonnes CO₂ hour⁻¹ example to the north; 3511 ± 537 tonnes CO₂ hour⁻¹ example to the south). (B) Methane plume from active face of a landfill in Iran (5 ± 1 tonnes CH₄ hour⁻¹). ppmm, parts per million meter.