Modern society’s continued dependence on fossil fuels is causing the Earth to warm at an unprecedented rate, causing catastrophic consequences such as droughts, wildfires, and floods around the world, according to a new report published today. United Nations declaration on climate change.
The new United Nations report on climate change is a wake-up call for all of humanity.
The report assessing the global climate state of the United Nations Intergovernmental Panel on Climate Change (IPCC) was just published on August 9, according to Nature.
The IPCC says the situation will get worse if greenhouse gas emissions continue at their current high levels. The IPCC emphasizes that the future of the Earth depends on the choices humanity makes right now.
“Evidence is everywhere. If we don’t act, the situation will only get worse,” said Xuebin Zhang, a climatologist in Toronto, Canada, and one of the report’s authors.
This is the IPCC’s sixth state of global climate report since 1990, with more than 200 scientists working on it over the years and approved by 195 countries in a virtual meeting last week.
Only when global emissions return to zero by 2050, the goal many countries have committed to, will the world be able to meet the target set out in the 2015 Paris Agreement, which is to limit global temperature rise. demand at 1.5 degrees Celsius, compared to pre-industrial times.
“The climate that humans will experience in the future depends on decisions made now,” said Valérie Masson-Delmotte, a French climatologist and co-chair of the physical science team that drafted the report. speak.
Earth’s surface temperature has increased by about 1.1 degrees Celsius since the years 1850-1900, the highest level since 125,000 years ago, before the last ice age, according to the IPCC.
The state of California in the US experienced a severe drought this summer.
Water levels in the global oceans have risen by about 20cm since 1900. The crumbling and melting ice sheets of Antarctica and Greenland due to global warming have caused sea levels to rise at a rate three times that of global warming. with the previous decade.
The report lists a range of impacts that climate change has on the Earth. That was evident at both the north and south poles.
Arctic ice cover in late summer is now at least 1,000 years lower than before. The disappearance of glaciers is unprecedented in 2,000 years.
The oceans are warming at a rate not seen since the end of the last ice age, 11,000 years ago.
The IPCC report addresses methane (CH4), the second most important greenhouse gas after CO2. Scientists say that the current level of CH4 in the atmosphere is the highest in 800,000 years.
IPCC mentions that the consequences of extreme climate change such as heat, drought, and even floods have reached record levels.
According to Zhang, if the temperature rises 2 degrees Celsius this century, extreme climate events that only happen once every 50 years will now happen every three to four years.
Extreme phenomena are increasingly common on Earth.
“We are not facing just one threat of climate change, but a series of threats occurring simultaneously,” Zhang said.
According to the content in the report, the phenomenon of sea-level rise is something that people will clearly feel for centuries, even millennia. If the temperature increase is kept at 1.5 degrees Celsius, the sea level will rise by 2-3 meters over the next 2,000 years and up to 6 meters if the temperature increases by 2 degrees Celsius. The result will be the lives of hundreds of millions of people. in coastal areas will be reversed.
The report warns that some of the most severe impacts of climate change cannot be ruled out, including the disappearance of huge ice sheets, arid forests, and sudden shifts in ocean currents…
The most uncertain of all climate change projections is that no one is sure how humans will act, the IPCC notes. For the past three decades, the IPCC has warned of the dangers of global warming, but countries have yet to take concrete action to move towards cleaner fuels and stop greenhouse gas emissions.
“Perhaps now, things will change. Because humanity has clearly felt the negative consequences of climate change,” Zhang said. “The worst has happened and is happening, everyone feels it. It’s true”.