Johann Hari

This week, a battalion of angry addicts brought London to a standstill. They snarled up the traffic, then marched on 10 Downing Street to demand their fix at prices they can afford.

Below the headlines about rocketing food prices and rocking governments, there lays a largely unnoticed fact: bananas are dying. The foodstuff, more heavily consumed even than rice or potatoes, has its own form of cancer.

In the next month, a decision will land on Gordon Brown's desk that will tell us how seriously he takes the greatest crisis facing us all – the drastic destabilisation of our planet's climate.

It is collective pressure on government, not consumer choices, that the world needs now

It will take just one bullet in this old general's chest for a massive nuclear arsenal to be up for grabs

If you live in Beijing and simply breathe the air, it has the same effect as 20 cigarettes a day

'These private contractors can get away with murder... They aren't subject to any laws at all'

The Bank is killing thousands of the poorest people in the world

They are beached on the shores of the wrong side of history, now abandoned even by Bush

Johann Hari on the plight of pregnant women in the West Bank, where babies are dying needlessly

There is a remarkable, untold story unfolding in one of the darkest parts of the planet

'Am I supposed to drink air?' asks a victim of Paul Wolfowitz's forced water privatisations.

İsrail hükümeti, tırmanmanın azaltılması ve aslında paylaşmaya mahkum oldukları bir parça toprak üzerinde, iki devlet ve iki halklı bir çözüme giden görüşmelere başlanması için henüz karar almış değildir. Onun yerine savaş kararı vermiştir.

Deprived of a state, Jews took up arms. Palestinians are in the same position today

If Blair's policy on terror was as scrappy and fickle as his stance on the environment, he'd have to resign.

It seems like everything has been warming up this autumn with one exception: Tony Blair's enthusiasm for dealing with climate change. Global warming is now proceeding so quickly it's hard to process all the information at once.

We may have just witnessed a global warming 9/11 at the heart of the United States. A million American refugees from the weather, the transformation of New Orleans into a New Atlantis: is this the face of climate change?

The best weapon any government has against toxic inequality is progressive income tax.

Oil wealth is supposed to trickle (no, cascade) up to multinationals, not downwards towards the poor.

Jeffrey Sachs has a simple message for the people of Britain. "Don't let the leaders [of the G8 countries] leave Scotland without offering serious plans for ending poverty and climate change.

Blair says Bush isn't doing enough, but the reality is that he's doing too much - in entirely the wrong direction.

The evidence is that extreme weather events are on the increase and we are responsible for more and more of them.