Somehow, a harebrained idea born in the grim depths of last winter has inadvertently become a reality, and today is my last day of working for Greenpeace before I head off to cycle across Africa.

I'll be taking a lot with me from my three years in this madhouse highly effective campaigning organisation - not least a criminal record, a habit of lying to friends and family about my whereabouts (in the run up to direct actions), and an antisocial compulsion to explain the beauty of decentralised energy to every passer by.

At the end of 2006 Greenpeace joined other environmental and campaigning groups to push for government action on climate change - under the name of the I Count campaign. At the time, the reality of global warming was only just being accepted by mainstream politicians, but through Stop Climate Chaos' I Count campaign thousands of us lobbied our MPs and helped to persuade many of them that the situation was serious and that genuine action was needed. Last month the positive results of all that effort were seen when a much beefed-up Climate Bill was passed by Parliament.

All of us who took part in I Count can be proud of our contribution to three major victories in the climate change debate, which have now been incorporated into the Bill.

The whalers' factory ship Nisshin Maru leaving Innoshima on Monday

Japan's whaling fleet slunk out of port earlier this week under a cloud of financial crisis and scandal, with none of the elaborate parades and marching bands of previous years' departures. This time the Nisshin Maru left the port of Innoshima with no triumphant fanfare, after the cancellation of the usual traditional departure ceremony in its home port of Shimonoseki. Word has it that this time, only a small group of 30 or so saw the whalers off - along with a hardy bunch of activists who protested with banner saying "whaling on trial" and one highlighting the whaling operation’s multi-million dollar drain on Japan’s taxpayers.

The past few weeks have not been good ones for the whalers - first of all was the deflagging of the support ship Oriental Bluebird. Japanese newspapers reported that, for the first time since the nation began 'scientific' whaling in the 1980s, the self-appointed quota would be decreased. Then we heard of the announced closure of Yushin (Toyko's largest whale meat shop), and news that for the first time, the whaling ships wouldn't be 100 per cent crewed: many former crew members were reluctant to sail again, following the whale meat scandal uncovered by a Greenpeace undercover investigation.

OK so I'm a day or two off the pace with this story (courtesy of a long weekend - well even we need a day or two off once in a while), and didn't find out about Monday's tuna direct action in Paris until I showed up at the office again today. So what did I miss? Well, our French colleagues took the opportunity to protest against France's leading role in decimating Mediterranean bluefin tuna stocks by dumping five tonnes of tuna fish heads outside the door of the French Fisheries Ministry.

Timed to coincide with coincide with the opening of the annual meeting of the International Commission for the Conservation of Atlantic Tunas (ICCAT), in Marrakech, the action targetted France (as opposed to Italy or Spain, the two other worst offenders) in this instance because French Premier Nicholas Sarkozy currently holds the EU presidency. He has been using it to shape the EU position in favour of the short-term interests of his fishing industry above the need to save the Mediterranean bluefin tuna stock from collapse.

This is part of Lake Suwakai, Runtu, where United Plantation's contractor constructed a road and stacked wood debris in the lake, presumably when the tidal lake was at its lowest. © Greenpeace

The first shipment of certified sustainable palm oil is due to arrive in Rotterdam any day now for a company called United Plantations. But our investigations on the ground in Indonesia reveal that Universal Plantations' operations are far from sustainable. In fact, they fail to meet the already inadequate criteria established by the Roundtable on Sustainable Palm Oil (RSPO - its a bit of a mouthful), and the certification, in this instance, looks like little more than a bit of marketing lubrication for the industry.
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The government would have you believe that all is well in the world of nuclear power. That the path to building more of them in the UK is smooth and care-free.

It isn't. We know this because we're keeping a keen eye on the whole process. A very keen eye. And Greenpeace investigations have exposed that the path is not as smooth as the government will have you believe.

Legal advice from top lawyers says that the government's nuclear plans are open to a number of challenges, on a number of fronts, over a number of years.

© Greenpeace/Kate Davison

If you've visited a Greenpeace website, or have received an email from a Greenpeace email address, you have a man called Sjoerd Jongens to thank for laying the foundations. He built the networks connecting Greenpeace offices and people, as well as helping Greenpeace to win campaigns in Antarctica and around the world.

Sjeord died in a bicycle accident on his way to work at Greenpeace International in Amsterdam last week. Brian pays tribute on Making Waves:

Sjoerd foresaw that a new thing called 'the internet' might be something we'd want to use in future, and he started a gopher, WAIS, and FTP server back in the late 80s. He registered the domain www.greenpeace.org and put our first website up in 1992, serving as the organisation's first webmaster...

He was possibly the grumpiest support person in the history of IT support. And yet he was beloved by everyone who caught a glimpse of the heart behind the gruffness. His managers, myself among them, quickly learned to keep him close to the computers, far from the staff. Mike Townsley once approached him to say he was having trouble with his laptop. "No, Mike. I suspect we'll find that your laptop is actually having trouble with you," was the unironic response.

But those who saw him at sea or in Antarctica saw a different Sjoerd...

Read Brian's tribute on Making Waves.

Two Greenpeace ships - one of them the Rainbow Warrior - have been impounded and their captains and 90 others arrested after three days of nonviolent direct actions in the Netherlands.

Some of the 100 volunteers occupying the construction site of a new E.on coal plant in Rotterdam.

I'll start at the beginning. On Friday evening, nearly 100 Greenpeace volunteers pitched tents next to the construction site of a new E.on coal plant in Rotterdam (one of eight E.on plans to build in Europe), to bear witness to the unfolding climate disaster.

At first light on Saturday, they moved onto the site and occupied it, stopping construction for 10 hours before all being arrested.

The climate crunch will soon make the credit crunch look trivial, and the G20 summit must tackle it now, writes Greenpeace UK Executive Director John Sauven writes for Comment is free.

This evening, 20 world leaders will gather in Washington, where they will dine at the table of their host, George W Bush, before attempting to perform life-saving surgery on the global economy.

Even in the face of the extraordinary repudiation delivered last week by the American people, Bush is unlikely to use the summit to also reshape the world's response to climate change. But that's exactly what his 19 guests should do.

"While the environmental threats facing Africans are urgent and critical, Africa is in a position to leapfrog dirty development and become a leader in helping to avert catastrophic climate change and protect the natural environment. We are here to help make that happen."

Greenpeace Africa is here! Marking a whole new era for Greenpeace, we opened our first African office yesterday, in Johannesburg. In the coming weeks, we'll be opening two more - one in the Democratic Republic of Congo, and the other in Senegal.