China proposes introducing a carbon tax

The developing world takes the lead in fighting climate change.

There have been growing murmurs from China that the country may be getting serious about tackling climate change, and yesterday Xinhua News Agency announced that:



The news follows on from the Chinese government's promise earlier this month to do "whatever it takes" to cap coal use in the country. The official — albeit non-binding — target is now for coal consumption to peak at 4 billion tonnes in 2015.

The full Xinhua report on the carbon tax is thin on details, but points to an earlier report from the Ministry of Finance which suggested "levying a carbon tax in 2012 at 10 yuan [£1.05] per tonne of carbon dioxide, as well as recommended increasing the tax to 50 yuan [£5.27] per tonne by 2020."

The New York Times' Vikas Bajaj notes that:

China’s plan will not make a serious dent in global warming, though the tax may still have some beneficial impact within the country, where air pollution is a serious problem. A paper from the Chinese Academy for Environmental Planning suggests that a small tax could still raise revenue and provide an incentive to reduce emissions, bolstering China’s renewable energy industry.

As much as many in the West have used the inaction of China as an excuse not to do anything about climate change ourselves, that logic has a corollary. China is such a massive nation that it is starting to be in its own interest to break the collective action problem which has plagued environmental causes forever. Its problems are compounded by the fact that not only is it heavily reliant on fossil fuels, but it uses those fuels in the most polluting manner possible. A glance at recent stories about smog in Beijing should reveal why the government is so concerned about reducing pollution.

The real choice the nation is faced with is whether to do that by following the Western path, of replacing polluting fossil fuels with cleaner ones, or skip that stage altogether and move straight to renewables. That move would be reminiscent of the way that many developing nations, particularly in Africa, have skipped wired communications infrastructure entirely and moved straight to mobile phones. It has its disadvantages, of course — primarily speed and cost — but also offers a huge prize at the end of the transition: if China can become a genuine world leader in renewable technology, it would likely have the 21st century sewn-up for good.

If that is the aim, this carbon tax will only be a stepping-stone on the journey. For it to truly offset the cost of pollution (and be an externality tax, rather than just a minor penalty for emitting carbon), it would have to be set in the order of £50-£100 a tonne. But if China starts to lead the way in fighting climate change, it will make it significantly harder for the developed world to carry on abdicating its responsibility.

Photograph: Getty Images

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

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Tetris and sleep deprivation: how we can help emergency workers cope with trauma

First responders are at serious risk of developing PTSD during events like the Paris attacks. 

Some people seem able to deal with anything. They save a stranger from bleeding out in a bombed restaurant, protect passers-by from heavily armed gunmen, pull dead and dying people out of collapsed buildings, and they keep going because it is their job. These people are first responders.

When trauma goes on for days, as it has recently in Paris, however, the odds of them bouncing back from the violence, death and injury they are witnessing rapidly diminishes. They are at greater risk of developing a severe stress reaction known as post-traumatic stress disorder (PTSD). One study found that the worldwide rate of PTSD among first responders is 10 per cent, much higher than the 3.5 per cent rate among those not involved in rescue work.

Tetris to the rescue

So how best to address the problem? Research is in its infancy, but there are some promising studies. Emily Holmes’ group at the University of Cambridge has been looking at the benefits of playing Tetris, a video game, after a traumatic experience. The idea is that this could block the consolidation of traumatic memories so they don’t “flash back” later on.

For the study, her team first traumatised people by showing them distressing footage from public safety videos. The next day they invited them back into the lab to reactivate the memories with still images taken from the videos. One group then played Tetris for 12 minutes while the other sat quietly. Over the following week, the group who played Tetris had about 50 per cent fewer unwanted memories from the films compared to the group who didn’t.

The team concluded that playing Tetris helped individuals because it soaks up their visual processing capacity, making it harder for the brain to consolidate the visual parts of a traumatic memory.

Since it takes about six hours for the brain to cement a memory, the key is to play the game soon after trauma or within six hours of re-activating the traumatic memory. How long the helpful effects of playing Tetris will last and whether it will translate into helping people after real-life trauma is still unknown.

Talking it through

Other techniques, such as “updating”, taken from a highly-effective talking treatment for PTSD, may be more practical and easier to implement.

Like a detective, updating is a technique that focuses on finding new information and linking it to the case, the past memory. This is necessary because when the brain and body are in survival mode during trauma, the mind finds it difficult to encode all the relevant facts. Often key pieces of information that could make the memory less traumatic are lost. Updating links new information to someone’s memory of their trauma to make it less upsetting.

But can updating help to reduce unwanted memories after trauma?

We carried out a study, published in PLOS ONE, in which we traumatised people by showing them terrifying films of humans and animals in distress. We then divided our participants into three groups. One group watched the films again but were given new information about how long people suffered and whether or not they lived or died – essentially, they were updated. The second group watched the same films again but without the new information. And the third group watched films of humans and animals who were not in distress. The updated group had fewer traumatic memories and PTSD symptoms than the other two groups.

Updating is now being used by some UK emergency services. First responders will gather after critical incidents and update their memories of what happened before they go home.

Sleep deprivation

There are other techniques that may be helpful. One study found that depriving people of sleep may be useful in the aftermath of trauma.

But the same study found that a week after the trauma, people who had been deprived of sleep had the same number of unwanted memories as people who had slept well afterwards. Consequently, it remains unclear whether there would be any long-lasting benefits using this method. There are, however, certainly health risks linked to lack of sleep.

Still looking for a solution

To develop preventative interventions, we need to study newly-recruited emergency workers who haven’t yet suffered on-the-job trauma and follow them over time, spotting which “coping styles”, present before trauma, may predict their reactions afterwards.

For example, some people naturally react to stressful life events by dwelling on them, thinking about why they happened for hours on end. This strategy, called rumination, has been linked to PTSD in people who survived car crashes.

If rumination predicts PTSD in first responders, then preventative interventions could train people to spot when they are dwelling on an event and refocus their attention to the task at hand.

When we have identified which factors heighten emergency workers’ risk of developing PTSD, programmes can be developed to target those vulnerabilities. Only then can an intervention, directed at first responders most at risk of developing PTSD, properly protect them in their line of work.

The Conversation

Jennifer Wild is a Senior Research Fellow in Clinical Psychology at the University of Oxford

This article was originally published on The Conversation. Read the original article.