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CBBC Newsround: Scientist warning over climate change and global warming

10 October 2018

Prepared by the UN Intergovernmental Panel on Climate Change‚ the report says that "urgent and unprecedented" changes are needed to reach the target.

Why do we need to limit global warming to 1.5C?

Joyashree Roy, a professor of economics at Jadavpur University and a co-author of the IPCC report, says: "We have found that the burden of global warming will fall disproportionately on the poor who are not responsible for the problem if we don't meet (the) 1.5 degrees target. You know, which group drew it", Trump said on the White House's South Lawn.

Temperatures could rise by 1.5 degrees Celsius as soon as 2030 if global warming continues at its current pace and the world fails to take rapid and unprecedented measures to stem the increase, experts warned in a landmark United Nations report on Monday.

Is It A Big Deal?

To slash that to less than 1.5C as laid out in the Paris agreement will require "rapid, far-reaching and unprecedented changes in all aspects of society".

It will be one of the main items discussed at a global conference in Poland in December, when governments will review the Paris Agreement (which the United States withdrew from in June 2017).

Climate scientists have been studying the effect of a global temperature rise of 3.6 degrees Fahrenheit (2 degrees Celsius) over preindustrial levels and have determined that is the maximum possible warming before sea level rise, drought, and other climate-change effects become catastrophic.

Matthew Spencer, Oxfam's director of campaigns and policy said: 'Climate change has set our planet on fire, millions of people are already feeling the impacts, and the IPCC is clear that things could get much worse without immediate action.

"The next few years are probably the most important in our history", said Debra Roberts, an IPCC co-chair.

How Can Cuts Be Achieved?

This means no more Carbon dioxide should be put out than is being removed by current measures, such as planting trees.

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Shafiq commenced with a stylish drive and conventional sweep before smoking Nathan Lyon (2 for 58) for a six over mid-wicket. Before the dust had settled, Abbas also got rid of Mitchell Marsh (nought) to leave Australia in disbelief.

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

RealClimateScience.com's Tony Heller ticked off past failed predictions of global-warming disaster, such as a 1989 U.N. warning that "entire nations could be wiped from the face of the earth" by rising seas unless global warming was reversed by 2000.

The report further revealed that global warming has already had an effect in regions across the world. Global sea levels rose 17cm in the 20th century.

The Paris pact aims to limit global average temperature rise to "well below" 2C above pre-industrial levels, while seeking to tighten the goal to 1.5C.

At 1.5 degrees, the report finds that 70 to 90 percent of tropical coral reefs will vanish.

Small islands and coastal cities such as NY and Mumbai risk going underwater without the installation of sea barriers. And, we have certain areas in the world, which are extremely sensitive.

Global net human-caused Carbon dioxide emissions would need to fall by about 45% from 2010 levels by 2030, reaching "net zero" around 2050, says the report.

The report notes that there are historic precedents for the speed we need, although not for the scale of required mitigation. He says this should include changes in how and what we eat.

"Urban systems that are moving towards transformation are coupling solar and wind with battery storage and electric vehicles in a more incremental transition, though this would still require changes in regulations, tax incentives, new standards, demonstration projects and education programs to enable markets for this system to work", the IPCC report said.

"It also means adapting to the growing impacts of climate change that are felt here, particularly to the increasing flood risks from heavy rainfall and from sea level rise along our coasts".

Hong Kong's climate action plan, published previous year, only pledges a 26 to 36 per cent cut by 2030 from 2005 levels.

CBBC Newsround: Scientist warning over climate change and global warming