Scientist warning over climate change and global warming - CBBC Newsround

Scientist warning over climate change and global warming - CBBC Newsround

The IPCC, in its report on global warming, said limiting it to 1.5 degrees Celsius will require rapid, far-reaching and unprecedented changes in all aspects of society.

What's the difference? 2 degrees means no more coral reefs, while 1.5 degrees mean only most will be wiped out. At the current rate of warming, the world as a whole will reach the 1.5° mark between 2030 and 2052, the report concludes.

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.

The report calls for huge changes in land, energy, industry, buildings, transportation and cities.

"It is seriously alarming", Amjad Abdulla, one of the report's authors, told BBC News.

He was talking to reporters on the sidelines of an event to release a report on "Strengthening Forest Fire Management in India", jointly prepared by the Ministry of Environment, Forest and Climate Change, and the World Bank. Their study, on the impacts and possible methods of keeping temperatures from warming by more than 1.5C, has just been launched in South Korea.

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.

Coral reefs will also be drastically affected, with between 70 and 90% expected to die off, including Australia's Great Barrier Reef.

"With more than 6,000 scientific references cited and the dedicated contribution of thousands of expert and government reviewers worldwide, this important report testifies to the breadth and policyrelevance of the IPCC", said Hoesung Lee, Chair of the IPCC.

Virgin will reach space in 'weeks, not months', says founder Branson
After that, it will be closer to its goal of offering commercial spaceflight to the 600 patrons who have paid $250,000 for a ride. Branson added that Musk "needs to learn the art of delegation" and should work to "find a fantastic team of people around him".

However, she says Canada will not increase its targets to cut emissions until the plan laid out in 2016 is fulfilled.

Limiting warming to 1.5 °C compared to 2 °C has clear and considerable benefits, such as significantly reducing the risks of water scarcity, ill-health, food insecurity, flood and drought, extreme heat, tropical cyclones, biodiversity loss, and sea level rise.

"Twenty-40% of the global human population live in regions that, by the decade 2006-2015, had already experienced warming of more than 1.5°C above pre-industrial in at least one season".

The IPCC report noted the world is rapidly losing any chance to limit average temperature increase to 1.5 degrees, though there is still a theoretical chance if the political will existed. In the Paris accord, 197 countries agreed to the goal of holding global temperatures "well below" 2 degrees C above pre-industrial levels and to pursue efforts to limit it to 1.5 degrees C. But Trump, who has ignorantly called climate change a "hoax", chose to withdraw the United States from the pact.

If nations do not mount a strenuous response against climate change, average global temperatures, which have already crossed 1°C, are likely to cross the 1.5°C mark around 2040.

"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.

To curb the trend, governments will have to spearhead "rapid and unprecedented societal transformation", including major reductions in their carbon emissions.

Such "carbon removal" might happen by developing better technology to take out carbon dioxide from the atmosphere - now an extremely expensive process - or by planting many more forests that could be harvested and burned for energy, with emissions pumped into underground storage. Despite the report's dire warnings, there is no indication such cooperation will be doable, particularly given the Trump administration's stance on this issue.

The decisions we make today are critical in ensuring a safe and sustainable world for everyone, both now and in the future, said Debra Roberts, Co-Chair of IPCC Working Group II.

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