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- Global warming should be limited to 1.5C rather than 2C to ensure the impacts of climate change, from droughts to rising seas, are less extreme.

"The reality is that we're very off track from where we need to be", says Rachel Cleetus, policy director for the Climate and Energy Program at the nonprofit Union of Concerned Scientists, who was not involved with the new report.

The world's governments asked for the report in 2015, when a global pact to tackle climate change was agreed upon.

Limiting global warming to 1.5°C will require "far-reaching and unprecedented changes", such as ditching coal for electricity to slash carbon emissions, the Intergovernmental Panel on Climate Change (IPCC) has said, launching a special report that said the world must move faster on climate change. Here are some of the key statistics raised in the report.

This report gives us hope - it is clear that it is possible to keep global warming to 1.5 C and that we now have the specific information we need to be able to make this happen.

It examined pathways available to limit global warming to 1.5 degrees Celsius above pre-industrial levels, what it would take to achieve them and what the consequences could be. Coral reefs would decline by a still unsustainable 70 percent to 90 percent instead of being virtually wiped out under the higher increase. Some HFCs have a global warming potential more than 11,000 times that of CO2.

"Limiting warming to 1.5°C brings a lot of benefits compared with limiting it to two degrees".

CSE said by refusing to endorse the findings of the IPCC's 1.5°C Report, the U.S. has again given a clear signal that it would continue with its "climate regressive agenda", which includes obstructing the work of the UNFCCC and promoting fossil fuels like coal and gas.

With that in mind, the report calls for huge changes in land, energy, industry, buildings, and transportation-use and across cities everywhere.

Promises made by countries to cut their emissions up to 2030 will not limit global warming to 1.5C even if action is massively scaled up after the end of the next decade, the report warns. Any additional emissions would require removing Carbon dioxide from the air.

Additional Secretary of the Environment Ministry AK Mehta said India is already facing climate change impacts. Moreover, if global temperatures were to exceed the mark temporarily, then, additional carbon removal techniques would be required to return warming to below 1.5℃ by 2100.

The lower target would also reduce species loss and extinction and the impact on terrestrial, freshwater and coastal ecosystems, the report said.

"It's a line in the sand and what it says to our species is that this is the moment and we must act now", Debra Roberts, cochair of a working group on the impacts of climate change, tells The Guardian.

On Monday, the United Nations issued "its most urgent call to arms yet for the world to confront the threat of climate change", say Mark Landler and Coral Davenport in the New York Times. "The next few years are probably the most important in our history".

The IPCC is a United Nations body assessing the science related to climate change, which has 195 member states.

The new IPCC report changes that.

The Washington Post: The World Has Just Over A Decade To Get Climate Change Under Control, U.N. Scientists Say - "The radical transformation also would mean that, in a world projected to have more than 2 billion additional people by 2050, large swaths of land now used to produce food would instead have to be converted to growing trees that store carbon and crops designated for energy use".

The IPCC report found that Australia was responsible for approximately 1 per cent of global emissions despite accounting for only 0.3 per cent of the global population.