CBBC Newsround: Scientist warning over climate change and global warming

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"In fact, [they could provide] two to six times more [than carbon cuts]". It suggests that carbon dioxide removal as well as drastic changes in human activity will be necessary to limit the rise to 1.5°C. "The 30 years of success of the Montreal Protocol should inspire us to take still stronger actions, and to use additional tailor-made agreements to address specific business sector emissions, with the full engagement of industry".

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.

In reality, it seems far more likely that the world will "overshoot" the 1.5 degree mark, causing irreversible harm.

The IPCC released the Special Report on Global Warming of 1.5ºC Monday.

Climate change should not be a divisive political issue.

"This is one of the most important reports ever produced by the IPCC, and certainly one of the most needed", Hoesung Lee, the chair of the body, said at a press conference in South Korea on Monday.

What do you make of this latest report? "If we do not change course by 2020, we risk missing the point where we can avoid runaway climate change, with disastrous consequences...."

The report has been published by the IPCC. When the next climate talks happen this December, the new report is created to give governments the incentive to go much further, faster. We are already ahead of those targets and are toughening up those targets.

Average global temperatures have already soared by an average of 1 degree since the start of the 20th century.

To provide sufficient incentive to reduce carbon emissions that quickly would require a carbon tax of $27,000, the report estimates-almost double the current price of emitting a ton of carbon under California's cap-and-trade program. The sea level will still rise, and there always be more extreme weather events and natural disasters, but these won't be as extreme as the worst case scenario we're now headed for.

The IPCC does not do any of its own research, so the report draws on more than 6,000 research papers to reach its conclusions.

But these new values aren't watertight, either.

These are just a few examples taken from a depressingly long list of climate change threats that would be made significantly more unsafe if the temperature were to rise by 2°C or beyond by the end of the century.

Tallas told VOA that people can help save the planet by changing the way they live.

Greenpeace East Asia climate and energy campaigner Walton Li said Hong Kong possessed one of the largest carbon footprints in the world and had a responsibility to "radically" revise its emissions strategy.

But those past predictions appear to have been far too conservative (a common critique of IPCC reports in general). This timeline should be strict enough to work with any range of carbon budgets thought to be consistent with the 1.5 C goal.

While the difference between 1.5 deg C and 2 deg C might seem small, some types of climate-change impact will be less severe by limiting global warming.

The new report by the Intergovernmental Panel on Climate Change acknowledges that the scale of the changes has no precedent. One recent report calculated the benefits at $26 trillion.

In the IPCC's most ambitious pathway, global net human-caused emissions of Carbon dioxide would need to fall by about 45 per cent from 2010 levels by 2030, reaching "net zero" around 2050.

During that historic conference in Paris three years ago, 197 nations (over 170 states and the European Union) had adopted new targets to help curb global warming, but in a controversial move, Donald Trump pulled the US out in June 2017, saying it was "unfair" to this country.

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

"Every industrialized country and every emerging economy has to strengthen midterm climate targets considerably", he noted. "These are impossible targets but will contribute to future discussions". But it's an idea that experts say should stay on the burner.

Reprinted from Climatewire with permission from E&E News.