What happens to humanity when the temperature of the earth increases by 4 degrees C?

More than two decades ago, public health experts warned: Climate change will harm human health.

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Initially the attention of public health professionals focused on the " main " effects on public health (eg: Heat waves, forest fires and floods) and " side " effects (eg as infectious diseases) of climate change.

You will find it reasonable for someone to assume that a more severe heat wave will be seen in the future, resulting in more victims falling into dehydration and death due to heat shock , accompanied by with discomfort. Human losses and material wealth are also expected to increase, as floods and other natural disasters are increasingly increasing in both quantity and severity.

From now until a few dozen years, the " main " effects and " secondary " effects of global climate change will have an increasingly significant impact on public health, which is a well-known fact. .

And if global temperatures rise by more than 2 ^degrees Celsius, human beings will suffer three times more serious natural disasters as a global food shortage.

The time has come, humanity needs to be prepared to deal with serious medical consequences
" 3 times " current is caused by climate change, when the earth temperature increases by 4 ^o C?

1. The most important community issues today:

Since the late 1980s, researchers have warned that warmer temperatures and patterns of global rainfall change will change the distribution of disease-causing insects such as ticks and mosquitoes.

In the late 1990s, when the scientific debate about the actual impact of global climate change was still unfinished, scientists sought evidence of malaria occurring in higher regions, especially in the East. Africa, which is home to a large population density, includes cities like Nairobi and Harare, formerly and now, with almost no disease.

This quest was somewhat motivated by a desire to convince health professionals, who also suspected that changes in the chemical composition of the atmosphere would affect the real world.

It is thought that increasing the number of malaria patients may be a sensitive signal that not only is climate change true, but it also has a direct impact on human health and this is completely can prove.

Scientists are also concerned: The impact of climate change: Heat flow, significant changes in rainfall and rising sea levels will reduce agricultural productivity, leading to serious food shortages on the land. micro global.

2. Looking for convincing evidence:

In early 2000, some parts of Europe experienced a terrible heat wave, resulting in about 70,000 deaths, among the oldest, the oldest, living in Paris, the city almost had a geographic location. The ideal and temperate climate of the ocean is cool and never experienced the previous heat wave phenomenon. In 2010, other countries such as India, Russia and Australia also experienced some heavy heat waves.

In fact, in the Victorian heat wave in 2009, many victims who were physically healthy may have been harmed by the heat rather than by fire, although fires also caused tremendous damage in terms of Physical and psychological for survivors.

Over the past decade, the range of influences of strange weather has increased throughout the world.

Most recently, evidence has been published on satellite television: The downpour is increasing, with the effect not only causing flooding, but also threatening infrastructure and food security. . The disastrous flood that Pakistani people experienced in 2010 is one of the vivid demonstrations of the impact of future climate.

Drought also affects health, and that is a forecast and there is some strong evidence that the rate and severity of drought is changing over time, getting worse and worse.

In some countries, scientists still debating about malaria are showing strong evidence that Lyme disease, which is spreading north of Canada. This shows that climate change can actually affect the spread of infectious diseases.

Australia often has less serious infectious diseases, despite diseases: Murray Valley encephalitis, Ross River virus fever and dengue fever are exceptional; These diseases may be due to changes in temperature and temperature changes.

3. Disaster identification:

Unfortunately, the serious " level 3 " medical consequences of climate change, say, are like an elephant hidden in a room. These " level 3 " effects further expand, in addition to losing crops in one area to other serious consequences as a source of weakening global food security. We are at an early stage of serious climate change and there is growing evidence that, without significant intervention, this climate change process will be accelerated.

A vivid example is: Food prices hit a record high in the world in December 2010. Currently, food prices are still very high. Although rising oil prices are a factor, climate change may be even more important.

Last month, floods in Mississippi damaged the corn harvest in the United States and in the near future; In the summer, there will be severe droughts in Europe and some other areas in China. Rice prices are likely to remain as high as every year, sometimes even higher.

Mississippi floods have damaged the corn harvest in the United States (Photo: Blogspot)

If we can limit the global average temperature to only 2 ^° C, then humans can avoid or at least manage and control "serious" level health consequences caused by the variable. climate change. Especially when this means slowing down the pace of global environmental change, it will create more opportunities for human preparation and adaptation.

But there is a growing consensus that: The global average temperature will increase by 4 ^° C (ie the climate will increase by 4 ^o hotter than today) which is our fate in the future.

In this scenario, sea levels will accelerate faster and faster, causing millions of people from homes in lowland areas to run refugees to live in the hills. Food security will face more risks.

The combination of forced migration and starvation can cause armed conflict and continue to hinder human development.

Currently, health experts have warned of serious " level 3 " medical consequences caused by climate change. Perhaps this may seem too early, or it may warn you to do it yourself and fear, pessimism and paralysis.

But scientists warn: They are obliged to warn " fire " when they see smoke in a theater. A world with a global average temperature of 4 ^° C, a catastrophe for human health, could be proven. So, more than ever, we must avoid this " disaster " at all costs.

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