Alarming portents from global warming report

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But they provide little hope the world will rise to the challenge.

The U.N. group, the Intergovernmental Panel on Climate Change, shared the Nobel peace prize with Al Gore in 2007 for its work to share information about climate change.

The report says the world will need an annual average investment of 2.4 trillion dollars between 2016 and 2035 (which is 2.5% of present world GDP) in energy system alone to limit the global warming to 1.5 degree celsius.

That's particularly true because most population growth in coming years "is going to be in urban areas - a lot of it particularly in small and medium-sized cities.in the global south", he said.

- The West Antarctic ice sheet might not kick into irreversible melting.

If global temperatures rise 2C above pre-industrial levels, the world's coral reefs - including Ningaloo and the Great Barrier - would die. He says there is still time for people to change their behavior to stop an increase in greenhouse gas releases.

Many in Trump's Republican party are self-described climate change skeptics, questioning whether the overwhelming consensus of scientists around the world about manmade causes for ever-rising temperatures is accurate.

Experts estimate that cutting down on SLCPs could reduce global warming by as much as 0.5 degrees C. That would not be enough to avoid the worst effects of climate change if we continue to burn fossil fuels, but it could buy humanity some much-needed time while carbon emissions are brought under better control. While the United Nations panel says technically that's possible, it saw little chance of the needed adjustments happening.

Countries must take "unprecedented" action to slash carbon emissions to zero by 2050 and limit unsafe global warming, a key report warns. At 2 degrees, that will be more like once per decade.

Since the report examines pathways available to limit warming to 1.5 degree celsius and what it would take to achieve them and what the consequences could be, it will be a key scientific input into the Katowice Climate Change Conference (COP24) in Poland in December, when governments review the Paris Agreement to tackle climate change. We're expected to hit that 1.5-degree mark around 2040.

The report suggests that coral reefs would decline by 70-90 percent with global warming of 1.5°C, whereas virtually all ( 99 percent) would be lost with 2ºC. This is analyzed in a recent study showing that the window to prevent runaway climate change and a "hot house" super-heated planet is closing much faster than previously understood.

The world has reached a fork in the road with two paths ahead: a planet that's 2°C warmer than pre-industrial levels and a planet that's 1.5°C warmer.

No new technologies are necessary to limit warming, according to the IPCC. It's therefore important for all the nations to make efforts towards limiting the warming. And I want to look at who drew it. He likened the report to an academic exercise wondering what would happen if a frog had wings.

This goal will require aggressive efforts by countries. They said it is up to governments to decide whether those unprecedented changes are acted upon.

"The world is already experiencing the deadly effects of global warming at 1C", chief executive Caoimhe de Barra said. Human-produced Carbon dioxide emissions would have to drop by 45 percent from 2010 levels by 2030, reaching "net zero" by 2050, according to the report. These heat-trapping gases are the byproduct of industrial processes such as refrigeration and can be eliminated from those processes by re-engineering. And that would have the side benefit of avoiding more than 100 million premature deaths through this century, the report said.

"Limiting global warming would also give people and ecosystems more room to adapt and remain below relevant risk thresholds".

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