Planet under Stress

We are a successful breed. Our advance from our hominid origins has brought us near-dominance of the world, and a rapidly accelerating understanding of it.

Scientists now say we are in a new stage of the Earth's history, the Anthropocene Epoch, when we ourselves have become the globe's principal force.

But several eminent scientists are concerned that we have become too successful - that the unprecedented human pressure on the Earth's ecosystems threatens our future as a species.
We confront problems more intractable than any previous generation, some of them at the moment apparently insoluble.

There are six areas where most experts agree that a crisis is brewing:

Food: An estimated 1 in 6 people suffer from hunger and malnutrition while attempts to grow food are damaging swathes of productive land.

Water: By 2025, two-thirds of the world's people are likely to be living in areas of acute water stress.

Energy: Oil production could peak and supplies start to decline by 2010.

Climate change: The world's greatest environmental challenge, according to the UK prime minister Tony Blair, with increased storms, floods, drought and species losses predicted.

Biodiversity: Many scientists think the Earth is now entering its sixth great extinction phase.

Pollution: Hazardous chemicals are now found in the bodies of all new-born babies, and an estimated one in four people worldwide are exposed to unhealthy concentrations of air pollutants.

All six problems are linked and urgent, so a list of priorities is little help.
It is pointless to preserve species and habitats, for example, if climate change will destroy them anyway, or to develop novel crops if the water they need is not there.

And underlying all these pressures is a seventh - human population.
There are already more than six billion of us, and on present trends the UN says we shall probably number about 8.9 billion by 2050.

Living within the planet's means need not condemn us to giving up what we now assume we need for a full life, just to sharing it.

The challenge we face is not about feeling guilty for our consumption or virtuous for being "green" - it is about the growing recognition that, as the human race, we stand or fall together.