Climate change: Why 1.5 is the new magic number

Climate change: Why 1.5 is the new magic number

The Intergovernmental Panel on Climate change says burning coal for fuel will need to end by 2050 if global warming is to be kept below 1.5 degrees.

"One of the key messages that comes out very strongly from this report is that we are already seeing the consequences of 1°C of global warming through more extreme weather, rising sea levels and diminishing Arctic sea ice, among other changes", said Panmao Zhai, Co-Chair of IPCC Working Group I, tasked with assessing the physical science basis for climate change.

Increasingly, you don't have to convince Australian farmers of that.

"Today the world's leading scientific experts collectively reinforced what Mother Nature has made clear - that we need to undergo an urgent and rapid transformation to a global clean energy economy", Gore Tweeted.

The report summary said renewable energy would need to supply 70 percent to 85 percent of electricity by 2050 to stay within a 1.5°C limit, compared with about 25 percent now. Scientists consider that temperature to be a tipping point at which many severe effects of global warming will be realized.

Li said the city's current climate strategy was not aggressive enough and urged the government to align itself with global efforts to limit warming to 1.5 degrees by setting an 80 per cent emissions reduction target for 2030.

"There were doubts if we would be able to differentiate impacts set at 1.5C and that came so clearly".

Overall, the Earth has to reduce the amount of Carbon dioxide produced each year by 45 per cent by 2030 - and reduce Carbon dioxide production to zero by 2050.

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The day after an worldwide panel of scientists issued a stark warning about the short window in which world leaders can act to avoid catastrophic climate change, the president of the United States didn't comment on whether the US accepts or will act on the findings.

Limiting temperatures to 2.7 degrees Fahrenheit above preindustrial levels, as the U.N.'s Intergovernmental Panel on Climate Change urges, is economically and practically.

Morrison says, 'Let's not forget Australia accounts for just over 1% of global emissions. "'It's a good reminder that no one experiences the global average temperature'".

Pre-industrial levels refers to the climate before the industrial revolution when greenhouse gas emissions were stable. Temperatures would be 1.5C higher between 2030 and 2052 if the world continued at its current pace, it warned.

Swiftly reducing emissions - even with carbon removal - will also require unprecedented levels of worldwide cooperation, a particular challenge as some national governments, like that in the United States, look increasingly inward.

"It is pretty much impossible to reconcile Canada's commitment - which we agreed to in the Paris climate agreement - to avoiding 2 degrees and hopefully 1.5 degrees of warming, with decisions to expand the LNG industry", said Simon Donner, a climate scientist at the University of British Columbia.

How Much Global Warming Has There Been Already?

It is thought that by 2100, global sea rise levels would be 10cm lower that if global warming were to be at 2C. But it is change on a scale we have never experienced before: "There is no historical precedent for the scale of the necessary transitions, in particular in a socially and economically sustainable way". What tends to happen with this kind of information is that it gets translated into a checklist of things we can do to make a difference - as individuals. It is also theoretically possible to transform the world's energy networks in a way that supports a lot more use of renewable energy and millions of electric vehicles, which means making space for a lot of energy storage.

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