This means no wood, Clean Coal, no Oil and NO Natural Gas burning. Natural Gas is a hydrocarbon, like Oil, the fact that oil has other junk and pollutants is irrelevant.
If you want try to save Six Billion people, we need to reduce the rate of increase in Global Warming, we must reduce the production of CO2, and CO, to zero -and soon, very soon.

Note, Methane is 20 times worse than CO2 in its Global Warming effects. When the Gigatons of solid Methane at the bottom of the oceans begins to come out, it is all over!
That will be the Last Tipping Point.

Note: A bacteria was found in Siberia, later in Alaska and Canada, that is produced when the PermaFrost melts. It eats other stuff in the soil and releases Methane.
Don´t be too sure we will win the fight against Global Warming, there are too many decision maker people unaware of key, and deadly, facts.
For example, CO2 will not last for a Century but FOREVER.

It is an stable molecule and nothing in the air will make split, regardless how long we wait. At one of your meetings some one said “Carbon Dioxide will last a century?”
Global Warming will stop when we reach 846 Deg. Fahrenheit, the temperature of the air in Venus.
At that temperature the heat emitted by the atmosphere will be equal and balance the heat received from the Sun.

We need a solid prediction on how long it will take for the maximum temperature in Las Vegas to reach 150 Deg Fahrenheit. Two summers ago, it reached 126 Deg. F.

Don´t pay attention to George Will, the ice cover in the Arctic shrunk by over one Million Sq. Miles and the Northwest Passage between the Atlantic and Pacific was fully open, NASA photos showed, for the first time, in 2008.
A British swimmer jumped into the waters at the very North Pole and stayed there for about 10 minutes wearing only Speedo Trunks, cap and goggles.
The best we can do for the Polar Bear is to capture as many as can be preserved in world´s city Zoo.
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But, can we stop natives from burning down the Rainforest?
I have serious doubts, if we cannot convince highly educated leaders in the Transportation Agencies to give up oil, what are the chances natives, that don´t even have words for Global Warming in their dialects will risk the survival of their family… and this problem is not even being considered.

To reverse the process that produced CO2, while producing electric power, the Second Law of Thermodynamics implies that a ¨greater¨, not an equivalent, amount of energy must be spend to separate the Carbon from the Oxygen than was produced from the burning of coal that bound them.

Its the Chemical Bond issue that some one got the Nobel Prize in Chemistry, or Physics, a long time ago. If this is too difficult, ask an engineer you trust to explain it.
In short: Clean Coal is a contradiction of terms.