As with many direct and indirect greenhouse gases, reductions in carbon monoxide emissions can most effectively be made through direct reductions in fossil fuel use. There is some evidence that the widespread use of catalytic convertors in cars has significantly reduced carbon monoxide emissions from this source. However, such reductions must be balanced against the increased emissions of the greenhouse gases carbon dioxide and nitrous oxide which often result from a switch to catalytic convertors.
The cows, sheep and other animals being served the feed still burp and fart — but it's almost methane free. (Kinley said 90 per cent of the methane actually comes from the burps, not the flatulence.)
Emissions involved in the consumption of electricity for transportation activities are included above, but not shown separately (as was done for other sectors). These indirect emissions are negligible, accounting for less than 1 percent of the total emissions shown in the graph.
It is important to note that there was a change in methods between 2014 and 2015 used to estimate gasoline consumption in the transportation sector. The change does not impact total . gasoline consumption. It mainly results in a shift in gasoline consumption from the transportation sector to industrial and commercial sectors for 2015. In the absence of this change, transportation greenhouse gas emissions would likely have been higher in 2015. The change is discussed further in the Energy chapter in the Inventory of . Greenhouse Gas Emissions and Sinks.
All emission estimates from the Inventory of . Greenhouse Gas Emissions and Sinks: 1990–2015 .
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A number of natural and man-made mechanisms can affect the global energy balance and force changes in Earth's climate.  Greenhouse gases are one such mechanism.  Greenhouse gases absorb and emit some of the outgoing energy radiated from Earth's surface, causing that heat to be retained in the lower atmosphere.  As explained above , some greenhouse gases remain in the atmosphere for decades or even centuries, and therefore can affect Earth's energy balance over a long period.  Radiative forcing quantifies the effect of factors that influence Earth's energy balance, including changes in the concentrations of greenhouse gases.  Positive radiative forcing leads to warming by increasing the net incoming energy, whereas negative radiative forcing leads to cooling. 
Pakistan and Sri Lanka in UAE, 3 T20 International Series, 2017
Anthropogenic (man-made) CO2 additions comprise (11,880 / 370,484) or % of all greenhouse gas concentrations, (ignoring water vapor ).