This week, the UN issued its sharpest warning to date.
"For too long we have been in a meaningless and suicidal war against nature," said Secretary-General António Guterres, warning that we are close to a point where there is no turning back.
Decreased by 15 percent
At the top of the atmosphere and at the bottom of the world's oceans - yes, everywhere scientists can now read the results of us burning our prosperity with the help of oil and coal.
Scientists call it the Anthropocene, a new geological age dating back to the Industrial Revolution, in which human activity is so dominant that it fundamentally changes the Earth's climate and ecosystem.
For decades, researchers have speculated that global warming could lead to a slowdown in our share of the Gulf Stream, the so-called North Atlantic deep-sea current.
In recent years, there have been speculations to accepted research results where the forthcoming report in the journal Nature Geoscience is just one in a series of research groups that, independently of each other, state that power has slowed by 15 percent since the mid-1950s - and that a slowdown of up to 45 percent is to be expected before the end of the century.
Sea acidification new concept
In the direction of danger is also that it can collapse, that is, melting ice accelerates a so-called "tipping point".
Then parts of Sweden could be affected by temperatures down to minus 50. It would threaten both life, health and our food production.
But global warming is also carbonating the oceans.
Sea acidification is a relatively new concept.
The oceans have received the excess of both carbon dioxide and heat and escaped it in its immense depths.
In fact, the oceans absorb more carbon dioxide than the world's forests.
When the carbon dioxide dissolves in water, carbon dioxide is formed.
Researchers have believed that the huge volumes of water in the world's oceans were a guarantee that they will always be stable.
It was wrong.
As the amount of carbon dioxide in the atmosphere increases, the pH value in the oceans has dropped.
Over the past 200 years, the world's oceans have become about 30 percent more acidic.
Animals are fleeing
This leads to animals and plants fleeing north towards the poles and the proportion of lime decreases.
Dying coral reefs are one of several consequences.
Exploring the oceans is complicated, and researchers emphasize that it is extremely difficult to assess how different parts of global warming will interact.
Should the Gulf Stream give us a colder climate, the parallel effect of warming is also going on - that the climate will be warmer and wetter.
The researchers do not know which system "wins", nor how they will collaborate.
The UN wants a sea agreement
But saving the blue part of our planet is also politically complicated.
Global decisions are required as a large part of the oceans are international waters.
No countries have the right to decide there, but many have great interests to exploit.
Less than one percent of the oceans have a marine protection status, while acidification and overfishing stress the oceans.
For several years, the UN has tried to negotiate a new legally binding global maritime agreement - so far without success.
Rowing it in port in 2021 would do more for the planet than the UN chief's recurring warnings about the seriousness of the situation.