Paul R. Ehrlich and Anne H. Ehrlich of Stanford University have a
piece on the topic.
They say humans are just destroying and unbalancing the overall living scenario:
There is no doubt that Earth is undergoing the sixth mass extinction in its history – the first since the cataclysm that wiped out the dinosaurs some 65 million years ago. According to one recent study, species are going extinct between ten and several thousand times faster than they did during stable periods in the planet’s history, and populations within species are vanishing hundreds or thousands of times faster than that. By one estimate, Earth has lost half of its wildlife during the past 40 years. There is also no doubt about the cause: We are it.
We are in the process of killing off our only known companions in the universe, many of them beautiful and all of them intricate and interesting. This is a tragedy, even for those who may not care about the loss of wildlife. The species that are so rapidly disappearing provide human beings with indispensable ecosystem services: regulating the climate, maintaining soil fertility, pollinating crops and defending them from pests, filtering fresh water, and supplying food.
The cause of this great acceleration in the loss of the planet’s biodiversity is clear: rapidly expanding human activity, driven by worsening overpopulation and increasing per capita consumption. We are destroying habitats to make way for farms, pastures, roads, and cities. Our pollution is disrupting the climate and poisoning the land, water, and air. We are transporting invasive organisms around the globe and overharvesting commercially or nutritionally valuable plants and animals.
The more people there are, the more of Earth’s productive resources must be mobilized to support them. More people means more wild land must be put under the plow or converted to urban infrastructure to support sprawling cities like Manila, Chengdu, New Delhi, and San Jose. More people means greater demand for fossil fuels, which means more greenhouse gases flowing into the atmosphere, perhaps the single greatest extinction threat of all. Meanwhile, more of Canada needs to be destroyed to extract low-grade petroleum from oil sands and more of the United States needs to be fracked.
The authors pick an example from the oil industry:
To see this phenomenon at work, consider the oil industry. When the first well was drilled in Pennsylvania in 1859, it penetrated less than 70 feet into the soil before hitting oil. By comparison, the well drilled by Deepwater Horizon, which famously blew up in the Gulf of Mexico in 2010, began a mile beneath the water’s surface and drilled a few miles into the rock before finding oil. This required a huge amount of energy, and when the well blew, it was far harder to contain, causing large-scale, ongoing damage to the biodiversity of the Gulf and the adjacent shorelines, as well as to numerous local economies.
The situation can be summarized simply. The world’s expanding human population is in competition with the populations of most other animals (exceptions include rats, cattle, cats, dogs, and cockroaches). Through the expansion of agriculture, we are now appropriating roughly half of the energy from the sun used to produce food for all animals – and our needs are only growing.
With the world’s most dominant animal – us – taking half the cake, it is little wonder that the millions of species left fighting over the other half have begun to disappear rapidly. This is not just a moral tragedy; it is an existential threat. Mass extinctions will deprive us of many of the ecosystem services on which our civilization depends. Our population bomb has already claimed its first casualties. They will not be the last.
Well, in water things are even worse. We might not find any ground water soon..
AS MK Gandhi said” there is a bit for everyone’s need but not greed..