"Global warming deniers seem to think that since carbon dioxide is essential for photosynthesis, that no amount of carbon dioxide can harm us."
DENIER: Anyone who suspects the truth.
You are a known troll with multiple banned accounts. You are obviously being paid by big green. Most likely Soros or Steyer. You are wasting your time lying. Why don't you get a job instead of wasting time trying to push this scam?
Fossil fuels emit only 3 pct of total CO2 emissions. 95pct comes from rotting vegetation. All the ambient CO2 in the atmosphere is promptly converted in the oceans to calcite (limestone) and other carbonates, mostly through biological paths. CO2 + CaO => CaCO3 (exothermic). The conversion rate increases with increasing CO2 partial pressure. A dynamic equilibrium-seeking mechanism.
99.84 pct of all carbon on earth is already sequestered as sediments in the lithosphere. The lithosphere is a massive hungry carbon sink that converts ambient CO2 to carbonate almost as soon as it is emitted. All living or dead organic matter (plants, animals, microbes etc. amount to only 0.00033 pct of the total carbon mass on earth. Ambient CO2 is only 0.00255 pct.
Atmospheric carbon dioxide (CO2) is a mild greenhouse gas that exerts a diminishing warming effect as its concentration increases.
Doubling the concentration of atmospheric CO2 from its pre-industrial level, in the absence of other forcings and feedbacks, would likely cause a warming of ~0.3 to 1.1°C, almost 50 percent of which must already have occurred.
At the current level of ~400 ppm we still live in a CO2-starved world. Atmospheric levels 15 times greater existed during the Cambrian Period (about 550 million years ago) without known adverse effects.
The overall warming since about 1860 corresponds to a recovery from the Little Ice Age modulated by natural multidecadal cycles driven by ocean-atmosphere oscillations, or by solar variations at the de Vries (~208 year) and Gleissberg (~80 year) and shorter periodicities.
Earth has not warmed significantly for the past 19 years despite an 8 percent increase in atmospheric CO2, which represents 34 percent of all extra CO2 added to the atmosphere since the start of the industrial revolution.
CO2 is a vital nutrient used by plants in photosynthesis. Increasing CO2 in the atmosphere “greens” the planet and helps feed the growing human population.
Due to the properties of logarithmic curves, the rate of temperature increase is inversely proportional to the level of CO2 already in the atmosphere. The more CO2 there is at any point, the smaller the rate of temperature increase.
As you add more CO2 to the atmosphere, the heating increase becomes smaller, not larger. This is called "decreasing returns to scale". Physical systems that have decreasing returns to scale are inherently stable.
We do not have enough fossil fuels to drive the atmospheric level of CO2 to anywhere close to a dangerous level.
Using all the reserves of fossil fuels now, would have little effect on global temperatures (beyond the natural warming).