Abstract
It has been widely observed that recent increases in atmospheric CO2 concentrations have had, so far, a positive effect on the growth of plants. This is not surprising since CO2 is an important nutrient for plant matter, being directly involved in photosynthesis. However, it is also known that the conditions which have accompanied this increase in atmospheric CO2 concentration have also had significant effects on other environmental factors. It is possible that these other effects may emerge as limiting factors which could act to prevent plant growth. This may involve complex interactions between prevailing sunlight and water conditions, variable temperatures, the availability of essential nutrients and the type of synthetic pathway for the plant species. The issue of concern to this investigation is if we should be worried about a possible shift in the C3-C4 paradigm driven by changes in the atmospheric CO2 concentration, or if some other factor, such as water scarcity, is much more relevant within a 30-year time frame. If an opinion is needed on what will have the worst effect on the survival of the planet between the scarcity of water or the reduced efficiency of C3 plants to sequester CO2, the issue of water is the more incisive.
Highlights
A higher concentration of carbon dioxide (CO2 ) in our atmosphere aids photosynthesis, contributing to increased plant growth
While it is certainly not appropriate to look at the CO2 fertilization effect in isolation, it is nonsense to claim that rising CO2 levels by itself might not be good for plants
While there is no direct negative effect of ambient CO2 enrichment on plant growth, this does not mean that other environmental issues will not limit plant growth soon
Summary
A higher concentration of carbon dioxide (CO2 ) in our atmosphere aids photosynthesis, contributing to increased plant growth. There has been a significant increase in greening around the world It is unclear if the explanation is a warming planet, the increased CO2 concentration in the atmosphere, a wetter climate, or possibly better, a combination of the three, that has caused more plants to grow. The authors move further discussing these results, to claim that the rising levels comment. In [6,7] the authors move further discussing these results, to claim thatCO the rising might not be as good for plants as we thought, questioning the fact that the rising CO2 the concentrations. 2 levels might not be as good for plants as we thought, questioning the fact that rising CO2 in the atmosphere produce faster growth of plants
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