Humankind will slip next week into ecological debt, having gobbled up in less then nine months more natural resources than the planet can replenish in a year, according to researchers.

The most dominant species in earth’s history, in other words, is living beyond the planet’s threshold of sustainability, trashing the house it lives in.

At its current pace of consumption humankind will need, by 2030, a second globe to satisfy its voracious appetite and absorb all its waste, the report calculated.

Earth’s seven billion denizens – nine billion by mid-century – are using more water, cutting down more forests and eating more fish than nature can replace, it said.

At the same time, we are disgorging more CO2, pollutants and chemical fertilizers than the atmosphere, soil and oceans can soak up without severely disrupting the ecosystems that have made our planet such a comfortable place for homo sapiens to live.

Counting down from January 1, the date when human activity exceeds its budget – dubbed earth Overshoot Day – had receded by about three days each year since 2001.

The tipping point into non-sustainability happened sometime in the 1970s, said the Oakland, California-based Global Footprint Network, which issued the report.

This year, researchers estimate that the equivalent of earth’s resource quota will be depleted on September 27.

“That’s like spending your annual salary three months before the year is over, and eating into savings year after year,” Global Footprint Network President Mathis Wackernagel said in a statement.

“Pretty soon, you run out of savings.”

Even as earth’s capacity to host our ever-expanding species diminishes, the demands on “ecosystem services” – the term scientists use to describe nature’s bounty – continues to grow.