1. Deforestation;
2. The continuing retreat of ice from since the peak of the last ice age; this retreat will continue for as long as we fail to reforest the land;
3. The Earth’s precession;
4. The elliptical orbits of the two large planets, Jupiter and Saturn; this orbits cause the increase and decrease of the sunspots during aphelion and perihelion; the El Niño La Niña phenomenons are caused by these orbits;
5. Of course we also have the changing seasons caused by the Earth’s own elliptical orbit and inclined polar positions away and towards the Sun;
6. The continuing increase of water vapor in the atmosphere resulting from the continuing melting of ice from since the last ice age and the continuing deforestation.

Water is the most potent climate changer as could be seen in the storms, hurricanes or super-typhoons, floods and snowfall. Without water these devastating climate events will not take place. Water has twice the capacity of CO2 to absorb heat, and is at 40,000 to 50,000 ppm in the atmosphere. Water vapor is lighter than CO2 or carbon and is able to rise to the highest levels of the atmosphere visibly as clouds to intercept solar radiation; clouds keep heat in the atmosphere. So as more vapor go up to the atmosphere because of the lack of forests, heat will build up increasing temperature levels. Even as there is precipitation or rains or snow, the net increase in the amount of vapor will continue without the forests that will keep water on the ground and facilitate the seeping onto the aquifers.

So much ado about carbon when the real culprit is water. So if we are really serious about climate change mitigation, there is only one effective solution: bring back the forests in all lands to where it all was 200 years ago.