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Scientists expect temperatures to rise to at least 2.5C

Hundreds of experts from the Intergovernmental Panel on Climate Change (IPCC) believe that global heating will blast past internationally agreed targets, with disastrous consequences for humanity and the planet.

According to a recent report, hundreds of the world’s leading climate scientists expect our planet to breach the internationally agreed 1.5C threshold by 2027 and temperatures to rise to at least 2.5C above pre-industrial levels this century.

This is due to emissions from human activities and the changing weather patterns we’re continuing to witness with each record-breaking summer.

Conducted by the Guardian earlier this month, the poll surveyed every contactable lead author or review editor (some 843 individuals) of the Intergovernmental Panel on Climate Change (IPCC), who’ve been collating and assessing all available scientific information about the climate crisis since 2018.

The United Nations body has so far published six studies of the scientific basis of climate change, its impacts and future risks, and options for adaptation and mitigation, acting as a crucial facilitator of climate change research and governance on both the national and international stages.

Of the 380 experts interviewed, 80 per cent foresee at least 2.5C of global heating, almost half anticipate at least 3C, and just 6 per cent thought the 1.5C limit would ever be met in the first place.

If their estimations play out, the consequences for humanity and the planet would be catastrophic.

Numerous participants envisage a ‘semi-dystopian’ future, with ‘famines, conflicts and mass migration, driven by heatwaves, wildfires, floods, and storms of an intensity and frequency far beyond those that have already struck.’

And many feel ‘hopeless, infuriated, and scared’ by the failure of governments to act in spite of clear evidence outlining what will happen if they don’t.

‘If the world, unbelievably wealthy as it is, stands by and does little to address the plight of the poor, we will all lose eventually,’ Dipak Dasgupta from the Energy and Resources Institute in New Delhi told the Guardian, citing the failure of the wealthy to tackle their disproportionate impact or to support those most vulnerable to environmental breakdown as a key issue to be addressed.

Almost all the experts agreed upon why the crisis will keep getting worse, and 75 per cent said it has to do with a ‘lack of political will’ to transition away from high-impact fuels, practices, and foods.

The world’s existing climate policies are in keeping with around 2.7C warming, and very few seem to believe a further reduction is likely – only 25 per cent of respondents think we’ll stay below 2C.

‘I am convinced that we have all the solutions needed for a 1.5C path and that we will implement them in the coming 20 years,’ said Henry Neufeldt, at the UN’s Copenhagen Climate Centre. ‘But I fear that our actions might come too late and we cross one or several tipping points.’

Countries have pledged, under the 2015 Paris Agreement, to try to hold global temperatures to no higher than 1.5C above pre-industrial levels, after scientific advice that heating beyond that figure would unleash a cascade of increasingly disastrous and potentially irreversible effects.

Already, we’re seeing far-reaching repercussions for health, food security, water management, and the environment worldwide, the likes of which will only be amplified without urgent intervention.

Looking ahead, Arctic temperatures are predicted to increase three times faster than the global average, while greenhouse gases will lead to more ocean acidification, sea ice and glacier melt, sea level rise, and more extreme weather.

There’s also set to be less rainfall in the Amazon, where a vicious cycle of warming and deforestation could tip the region from carbon sink into savannah-like conditions.

‘I think we are headed for major societal disruption within the next five years,’ Gretta Pecl, from the University of Tasmania, told the Guardian.

‘[Authorities] will be overwhelmed by extreme event after extreme event, food production will be disrupted. I could not feel greater despair over the future.’

Despite this bleak perspective, however, those surveyed stressed the importance of persisting with the fight against climate change because each fraction of a degree avoided can reduce suffering for us now and for future generations.

‘It doesn’t mean a utopian future – we know too much climate change is already baked into the system – but enormous positive change is coming,’ said Christiana Figueres, the UN climate chief who oversaw the Paris Agreement. ‘A world in which we pass 1.5C is not set in stone.’

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