Excellent, lengthy article by Jonathan Watts, reflecting on his nine years' reporting from China includes:

The mix of communist politics and capitalist economics appeared to have created a system designed to exploit people and the environment like never before.

This has been a decade of cement and steel, a time when economic development has pushed into the most remote corners of China with a series of prestige projects

This has been an era of protest in China. The government stopped releasing figures a few years ago, but academics with access to internal documents say there are tens of thousands of demonstrations each year. The reasons are manifold – land grabs, ethnic unrest, factory layoffs, corruption cases and territorial disputes. But I have come to believe the fundamental cause is ecological stress: foul air, filthy water, growing pressure on the soil and an ever more desperate quest for resources that is pushing development into remote mountains, deserts and forests that were a last hold-out for bio and ethnic diversity.

This is not primarily China's fault. It is a historical, global trend. China is merely roaring along the same unsustainable path set by the developed world, but on a bigger scale, a faster speed and at a period in human history when there is much less ecological room for manoeuvre. The wealthy portion of the world has been exporting environmental stress for centuries. Outsourcing energy-intensive industries and resource extraction have put many problems out of sight and out of mind for western consumers. But they cannot be ignored in China.

The worst problems are found in the countryside: "cancer villages", toxic spills, pitched battles to block a toxic chemical factory, health hazards from air pollution and water and the rapid depletion of aquifers under the north China plain – the country's bread-basket.

The implications are global. China has become the biggest greenhouse-gas emitter on the planet. This year, it will probably account for half the coal burned in the world. The number of cars on China's roads has increased fourfold since 2003, driving up demand for oil. Meanwhile, there is less and less space and respect for other species. For me, the most profound story of this period was the demise of the baiji – a Yangtze river dolphin that had been on earth for 20m years but was declared extinct in 2006 as a result of river traffic, pollution, reckless fishing and massive damming.

I switched my focus to environment reporting. It was not just the charismatic megafauna and the smog, though the concern about air quality never went away. It is really not funny to send your children off to school on days of high pollution with a cheery "Try not to breathe too much", knowing they will probably be kept in at break-times because the air outside is hazardous.

As I have noted at greater length elsewhere, I had come to fear that China may be where the 200-odd-year-old carbon-fuelled capital-driven model of economic development runs into an ecological wall. Britain, where it started, and China may be bookends on a period of global expansion that has never been seen before and may never be repeated again.

Developed nations have been outsourcing their environmental stress to other countries and future generations for more than two centuries. China is trying to do the same as it looks overseas for food, fuel and minerals to satisfy the rising demand of its cities and factories. This has been extremely good news for economies in Africa, Mongolia, Australia and South AmericaI sympathise with China. It is doing what imperial, dominant powers have done for more than two centuries, but it is harder for China because the planet is running short of land and time.

 In the future, I believe the most important political division will not be between left and right, but between conservers and consumers. The old battle of "equality versus competition" in the allocation of the resource pie will become secondary to maintaining the pie itself.

China: witnessing the birth of a superpower