How many people might die from climate change?

Sorry that is the sort of question which cannot be answered accurately.

Social systems, environmental systems and climate systems are complex systems which means they cannot be predicted in detail. All these systems will be interacting with different forms of landscape – such as low lying areas, loss of glaciers and water and so on. We need all of them to remain stable to make valid detailed predictions. All we can predict is the general trends, and these can be disrupted by rapid changes of state into new systems which may not be human friendly.

The trends are likely to be extreme. People will try and move from parts of the earth which become difficult to live in, because of temperature (heat stroke, heart failure, dehydration), lack of drinking water and sea level rise, and that will likely cause wars – in which people will die as well. The massive storms we have seen will cause deaths as well, as well as disrupt the balance and interconnection of social functioning which will produce more deaths. Destruction of agricultural stability will produce problems with food supply, which is likely to produce malnutrition, which makes people more vulnerable to the other effects. Tropical diseases will move into what have been temperate climates, as well as be carried by people movement. It is likely that those of us who live in temperate environments will have little resistance to these diseases. We may see some parts of the world which have previously been uninhabitable become open to human life and the great powers will compete over those areas, which is also likely to produce war and death.

We also keep polluting the oceans which will disrupt the climate and ecological systems. Many biologists think that ocean death is possible, this will mean we will lose most of our fish stocks, we may also lose oxygen supplies if the plankton die and we keep cutting down forests, although it is unlikely we will kill ourselves, this will also lessen resilience.

With pro-corporate policies which help corporations release chemicals pollution without much in the way of check we will also poison ourselves and the other creatures and plants we need to live. The results of these chemicals on bio-system evolution cannot be predicted at all…

Basically there are a whole heap of endangering ecological processes going on, of which climate change is only one. What the results of multiple chaotic disruptions will be is absolutely unpredictable. However, it can be predicted that normality is going and that many people will die as a result.

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