Over 15,000 scientists across the globe have issued a worldwide warning: there needs to be changed to save Earth.
It comes after the initial notice in 1992 when a mere 1,500 scientists issued a warning.
This cautioning -- that gained fame with #ScientistsWarningToHumanity -- acquired more than 15,000 signatures.
William Ripple, Oregon University's Forestry Department, said that he came across warnings in 1992 and also noticed that this season occurred to mark the 25th anniversary.
Christopher Wolf, together with his graduate student, gather data for factors that were various to show trends over the past 25 years, and he chose to revisit the concerns raised afterward.
Ripple found there was a decrease in population growth, unsustainable marine fisheries, ocean dead zones, forest losses biodiversity, climate change and freshwater availability.
"The trends are alarming, and they talk for themselves," Ripple said, although he notes that the improvement from the ozone hole illustrates that humankind can make the shift when needed.
After composing the perspective article, which was accepted for publication in the journal BioScience, he decided to see whether he could once more gather signatures.
"I had never tried that before, so in July I sent [the post] to 40 coworkers of mine, and from the following day, 600 scientists had signed it," he told CBC News.
Within two weeks, there were 1,200 signatures. From Canada, 527 are of the greater than 15,364 signatures up to now, ranking the eighth one of 184 nations.
The objective of the paper is to raise awareness about the state of Earth.
"The scientists around the world are extremely concerned about the condition of the world, the ecological climate, and climate change," Ripple said. "So this enables them to have a collective voice."
'at the park fo an extinction event.'
There is rising evidence that Earth has entered the sixth mass extinction event caused by people.
"We are in the throes of a mass extinction event that's anthropogenic," Crist said. "This is not something we can fix. If we shed 50 to 75 percent of those species on the planet in this century -- which is what scientists are telling us exactly what will happen if we continue to operate as business-as-usual -- if this happens, this can not be fixed."
Crist stated that she does not think of it like that when asked whether she is optimistic that the petition is going to have an impact on changes. Taking care of the planet is comparable to taking good care of someone's family.
"We take care of our own families: our children and our spouses and our parents. When you look after your family, you do not do it because you are optimistic or pessimistic ... it's because that's exactly what you do.
"Our mandate is that people treat Earth and earthlings and human beings because we're all family."
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