Thursday, February 12, 2015

Scorched Earth, 2200AD

I stare out the window from my tiny flat on the 300th floor, hermetically sealed in a soaring, climate-controlled high-rise, honeycombed with hundreds of dwellings just like mine, and survey the breathtaking vistas from my lofty perch more than half a mile above ground: the craftsman cottages with their well-tended lawns, the emerald green golf courses, the sun-washed aquamarine swimming pools and the multimillion-dollar mansions that hug the sweeping sands from Malibu to Palos Verdes. These images evoke feelings of deep nostalgia for a Los Angeles that doesn’t exist anymore, back in the halcyon days before my great-grandparents were born, when procreation wasn’t strictly regulated and billions of people roamed freely on Earth.

There are only about 500 million of us left, after the convulsive transformations caused by climate change severely diminished the planet’s carrying capacity, which is the maximum population size that the environment can sustain. Most of us now live in what the British scientist James Lovelock has called ‘lifeboats’ at the far reaches of the northern hemisphere, in places that were once Canada, China, Russia and the Scandinavian countries, shoehorned into cities created virtually overnight to accommodate the millions of desperate refugees where the climate remains marginally tolerable.

What I ‘see’ outside my window is an illusion, a soothing virtual imitation of a world that once was, summoned by impulses from my brain. Yet the harsh reality is unsettling. As far as the eye can see, what’s left of civilised society is sheathed in glass – the ribbons of highways ferrying the bullet trains that encircle megacities where millions cram into skyscrapers hundreds of stories high; the vast tracts of greenhouses covering chemically enhanced farms where fruits and vegetables are grown and livestock graze; and even the crowded subterranean villages artificially lit to mimic the experience of walking outside on a sunny, spring day. (...)

It seems like hubris to think we can somehow save ourselves through Lovelockian lifeboats strung across the landscape, given the extent of the damage some experts believe we will wreak. Climate models predict temperatures could rise by four degrees Celsius (7.2 degrees Fahrenheit) or more by the end of this century, a level that Kevin Anderson of the UK’s Tyndall Centre for Climate Change Research described as ‘incompatible with any reasonable characterisation of an organised, equitable and civilised global community’.

‘We will see temperatures higher than any known during human civilisation – temperatures that we are simply not adapted to,’ says Heidi Cullen, chief scientist for the NPO Climate Central in Princeton, and author of The Weather of the Future (2010). ‘With each passing year, our “new normal” is being locked in with the full impacts arriving towards the latter part of this century,’ she says. ‘It’s hard for us to imagine that large parts of the planet would be unlivable outdoors.’

An increase of seven degrees Fahrenheit would see mass migrations from some of the most humid places on Earth – the Amazon, parts of India, northern Australia. Rising sea levels of four feet or more and ferocious storms would flood coastal cities from Tokyo to Mumbai, and submerge low-lying areas such as Bangladesh and Florida, displacing millions. Earth’s most populated areas, that belt of land extending from central China and most of Europe, Africa, Australia, the US and Latin America, would be parched by this century’s end, drying up surface water and killing crops that hundreds of millions depend upon for survival. Nearly half the world’s population, almost 4 billon people, could be enduring severe water scarcity and starvation, numerous studies suggest.

Scorching heat waves and cataclysmic fires will spark food riots, famine and mass migrations of millions. An explosion in insects will trigger widespread outbreaks of typhus, cholera, yellow fever, dengue, malaria and a host of long-dormant or even novel pathogens, unleashing epidemics reminiscent of the Black Death which killed as many as 200 million people in the 14th century. Once-teeming metropolises would become watery ghost towns: Picture Manhattan, Tokyo, São Paulo underwater, sparsely populated colonies of hardy survivors who eke out vampire-like subterranean existences, emerging only at night when the temperatures dip into the low triple digits.

Worse yet, temperatures won’t conveniently stabilise at just seven degrees of warming – Earth’s climate won’t reach a new equilibrium for hundreds of years because of all the heat trapping carbon dioxide that’s already been dumped into the environment. ‘We have only felt a fraction of the climate change from the gases already in the atmosphere,’ said James Hansen, a leading climatologist and director of the Earth Institute at Columbia University, recently. ‘Still more is in the pipeline because the climate system has enormous inertia and doesn’t change that quickly.’ The planet will continue to heat up, triggering feedback loops of runaway climate change, until we can kiss most of civilisation goodbye.

by Linda Marsa, Aeon |  Read more:
Image: Ed Freeman/Getty