Published: Wed, October 10, 2018
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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 (IPCC) has effectively delivered a final call on world leaders to take urgent action to stop the planet from overheating. He says preventing the world temperature from rising by one-half degree Celsius would make a huge difference in the well-being of the planet. "Over 187 cities globally participate in that symbolic gesture of switching off your lights for that one hour, to say I really care about this and I want to be part of the solution", Ms Richter said.

Where Has The Warning Come From?

The climate modelling called socioeconomic pathways, or SSPs, looks at choices individuals can make to contribute towards the 1.5 degrees Celsius limit on global warming based on pre-industrial levels.

Like it or not, climate change and global warming are things that concern all of us.

That means trying to limit the increase in the average global ground temperature to 1.5 degrees C, rather than 2 C as specified in the Paris climate change accord.

There are a lot bigger players than us out there.

"The next few years are probably the most important in human history", IPCC co-chair Debra Roberts, head of the Environmental Planning and Climate Protection Department in South Africa, told Agence France-Presse.

By 2050, humanity would need to cut its net emissions to zero.

If emissions can't be cut to a sufficient degree, researchers will need to devise effective methods of removing Carbon dioxide from the air, such as devoting land to growing trees and biofuel crops, Erik Solheim, executive director of the UN Environment Program, tells The Washington Post.

The targets rely on increased use of renewable energy, to the point that they product 70 to 85% of electricity supplies by 2050.

The only regulations introduced by the former government involved coal-fired power plants.


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.

The report further revealed that global warming has already had an effect in regions across the world.

Recognizing both Nordhaus and Romer together acknowledges the need to start using the power of the market economy to address unsustainable trends and the increasingly apparent reality that we can only achieve the necessary ends through technological advances, many of which do not yet exist.

Chris Mooney, covers climate change, energy and the environment for the Washington Post. Global sea levels rose 17cm in the 20th century.

What Will We See Once Global Warming Is Limited To 1.5C?

Earth is on track to face devastating consequences of climate change - extreme drought, food shortages and deadly flooding - unless there's an "unprecedented" effort made to reduce greenhouse gas emissions by 2030, a new United Nations report warns.

The impact of 1.5 degrees Celsius warming is greater than what was anticipated earlier while the impacts at two degrees Celsius are "catastrophic" for the poor and for developing nations such as India, the Centre for Science and Environment (CSE) said. "It is also expected to drive the loss of coastal resources, and reduce the productivity of aquaculture", the report says.

"It will take government resolve", he said.

"Limiting warming to 1.5°C is possible within the laws of chemistry and physics but doing so would require unprecedented changes", said Jim Skea, co-chair of IPCC Working Group III. We can't find any historical analogies for it. And, we have certain areas in the world, which are extremely sensitive.

But meeting the more ambitious goal of slightly less warming would require immediate, draconian cuts in emissions of heat-trapping gases and dramatic changes in the energy field.

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