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UN Says 'Unprecedented Changes' Needed to Combat Global Warming in 12 Years

UN Says 'Unprecedented Changes' Needed to Combat Global Warming in 12 Years”

"E$3 ven with erroneous attribution of extreme weather/climate events and projections using climate models that are running too hot and not fit for goal of projecting 21st century climate change, the IPCC still has not made a strong case for this massive investment to prevent 1.5C warming", she said on her Climate Etc. blog.

Limiting global warming to 1.5 instead of 2 degrees Celsius by 2100, as called for under the Paris climate agreement, would curtail global sea level rise, reduction of Arctic sea ice, and the decline of coral reefs, according to the report.

Another recent report from the consulting firm PwC makes it clear that even limiting warming to 2 degrees C will be a stretch: "There seems to be nearly zero chance of limiting warming to well below two degrees (the main goal of the Paris Agreement), though widespread use of carbon capture and storage technologies, including Natural Climate Solutions, may make this possible", it says.

However, keeping global warming below this level will require "annual average investment needs in the energy system of around $2.4 trillion (around €20.8 trillion)" between 2016 and 2035, according to the report.

A United Nations climate report on Monday said avoiding global chaos will require a transformation of society and world economy "unprecedented in scale".

The leading body of climate change researchers has urged world leaders to commit to limiting global warming to 1.5 degrees Celsius rather than the original commitment of below 2 degrees.

Similarly, when it comes to heat waves, in a world that's warmed by up 1.5C, about 14% of the population are exposed to a heat wave every five years. "Limiting warming to 1.5ºC is possible within the laws of chemistry and physics but doing so would require unprecedented changes", says Jim Skea, Co-Chair of IPCC Working Group III, in a press statement. "Climate change is significantly contributing to increased heat-related mortality", the report reads. "And it just may be enough to save most of the world's coral reefs from dying".

Temperatures have already risen an average 1C since the mid-1800s as industrialisation fuels the growth of carbon dioxide emissions (CO2), the main greenhouse gas blamed for climate change.

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He warned the world was already seeing the beginning of "massive displacement and a shocking rise in hunger" - and unless temperatures stayed below 1.5C, island nations would disappear beneath rising seas.

The review of thousands of scientific papers also said the spread of disease and economic damage and harm to yields of crops will be less severe at 1.5C than 2C, as will the extinction of species.

Around 6 percent of insects, 8 percent of plants, and 4 percent of vertebrates are projected to be negatively affected by global warming of 1.5°C, namely by shrinking their natural geographic range, compared with 18 percent of insects, 16 percent of plants and 8 percent of vertebrates for global warming of 2°C. "It is crucial to keep temperature rise well below 1.5 degrees without offsetting, carbon markets, and geoengineering, but the evidence presented by the IPCC shows that there is a narrow and shrinking window in which to do so".

"Scientists might want to write in capital letters, 'ACT NOW IDIOTS", but they need to say that with facts and numbers, ' said Kaisa Kosonen, from Greenpeace, who observed the negotiations.

Two of the most intense typhoons on record have hit the city in the last two years - Hato last year and Mangkhut last month.

A rise in global temperatures by another 0.5 degree Celsius would increase, deepen and spread the impacts wider, the scientists concluded.

To ensure the planet is liveable, global Carbon dioxide emissions have to be reduced by 45% from 2010 levels by 2030 and renewables must provide up to 85% of global electricity by 2050 to meet targets. Therefore, even though urgent action is a necessity, it should be equitable and the onus of addressing climate change can not fall on the developing world. He fears that the IPCC report undersells the difficulty of achieving the 1.5 °C goal.

The report makes it clear that climate change is already happening - and what comes next could be even worse, unless urgent worldwide political action is taken. What's more, greenhouse gas emissions need to drop.



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