Copenhagen, Denmark - It's one of the first messages that I see at Copenhagen airport. "Let's turn Copenhagen into Hopenhagen." Posters displaying this slogan adorn the city everywhere I go.

A 'Hopenhagen' poster on display in the Danish capital.

Over the last few days, covering the events at COP 15, one wonders if perhaps the Danish government itself has been a little too hopeful thinking that a legally binding international document to replace the Kyoto Treaty can ever be achieved.

But while headline-grabbing issues - "Climategate"and the "Danish text" - have cast a shadow over the summit's Bella Center venue, there is still plenty of hope abounding that some sort of framework document or political agreement will be reached by December 18th.

This is down to mainly the overwhelming amount of young people present here. So far, I've seen people dressed as mermaids, robots and a strange version of the Blues Brothers in red suits.

It's their enthusiasm that's infectious and I think also serves as a reminder as to why the international community has a great responsibility to come to some type of accord. It's not for our generation so much but for those who come after us.

As one young activist told me, she doesn't mind looking silly if a strange costume is what it takes so that people hear her message. Looking at the hundreds of forgettable attendees in the halls, she might have a point.

Hopeful too are the non-governmental organizations. They cite U.S. President Barack Obama's visit as the catalyst for their optimism.

Everybody knows that the two key countries that could influence the outcome of this summit are China and the United States. The latter even more so as where it goes, others tend to follow.

In the impressive American Summit Center, while hundreds gather around a big screen watching the U.S. president receive his Nobel Peace Prize, one of his secretaries tells us that if Obama can't drive the COP 15 agenda forward, who can?

It's a message that seems to be shared by many people here who admit that their hopes were much lower even two weeks ago when it looked like COP 15 was not going to be much more than a massive anti-climax. President Barack Obama? Yes! He can!

It's the vibrancy of the Bella Center which is really captivating however. In terms of events that I've helped cover, this is by far the largest in terms of the amount of journalists and participants who are here. Apparently 3,500 journalists are accredited as opposed to the 2,000 which were originally expected.

Here in the halls, people in traditional Peruvian costumes jostle for space with the suited observers from energy companies and over-excited young students. There seems to be a representative from literally every part of the world and everyday there seems to be more and more people...all with a message to bring.

It will be interesting to see if COP 15 really will be remembered by the world as the summit that changed the course of climate change, whether optimism can overcome the deep chasms between the developing world and the so-called developed world, whether negotiators can succeed in managing the delicate balance between economy, industry and our earth's fragile existence.

But for the next week or so the city of Copenhagen continues to be Hopenhagen.

GREENOCK, Scotland – Embarking on our trip to Scotland early Monday morning to cover the potential release of the only man ever to be convicted for the 1988 Lockerbie bombing, we thought we would return to London barely 24 hours later.

Three days later, we remain here, in Greenock, a small town on the west coast of Scotland, a town which for the last four years, Abdelbaset Ali Mohmed al Megrahi has had to call "home."

In that time, we've visited Lockerbie. We're seen the garden memorial which has replaced the huge crater left by the flaming fuselage when it fell from the sky, it in turn, replacing the homes that had stood there and the families who had lived in them.

We've heard from eyewitnesses and emergency workers who cannot forget what they saw, even over 20 years later. We've heard conspiracy theories from local politicians who have blamed Iran, the Palestinians and the U.S.

We've even heard from relatives of the dead who really believe that the Scottish justice system has got it wrong and that Megrahi is an innocent man.

As we file more reports and speak to more involved parties, this case seems to get murkier and ever more confusing and my thoughts begin to lie with the one man who now has to decide the fate of the Libyan.

Kenny MacAskill, Scotland's Justice Secretary, has been given the sole responsibility of determining the fate of the terminally ill Meghari.

The Scottish Parliament has said that it doesn't need to be involved. Scotland's First Minister Alex Salmond has said that he trusts whichever decision MacAskill will take.

Supportive words, but hardly conducive for a man who needs to weigh up years of evidence, appeals, medical advice and family statements.

Since we came to Scotland, political heavyweights such as U.S. Secretary of State, Hillary Clinton, Senators Edward Kennedy and John Kerry have weighed into the debate, urging MacAskill not to allow Meghari to go free.

The Justice Secretary hasn't even been able to count on the support of his own colleagues with the Scottish Secretary, Jim Murphy, yesterday slamming the ongoing situation as "embarrassing."

And so as we wait, busying ourselves collecting our elements and watching the news wires for updates, I feel rather sorry for the beleaguered Scottish politician who must be now sitting in his office, pouring over reams of material and trying to work out the right thing to do.

LONDON, England – It costs a hundred dollars a shot. It's allegedly the most expensive coffee in the world. Even the royal family are said to drink it. But this still doesn't detract from the fact that some of the beans that make it are selected from... cat excrement!

Made by the Italian company De Longhi, Caffé Raro combines Jamaican Blue Mountain and Kupi Luwak, two rare coffees.  It's the Kupi Luwak coffee which has the particularly fascinating ... if somewhat delicate origins. The natural "barista" which selects this bean is the palm civit cat, a badger-like creature which resides in Asia. It apparently has a natural affinity for "quality" coffee cherries. Its superior palate cannot digest the beans within the cherries and so nature ensures that they leave the body. But it is man who has decided that the beans in the civit cat droppings are not just safe for human consumption, but should actually be considered a delicacy. A delicacy which costs $100 a shot!

The display for Caffe Raro at Peter Jones was a little underwhelming. Six boxes of the beans arranged in a pyramid formation. Some cups lined up. For something that costs so much, I half-expected an armed guard and a glass case. Marco Zacharia, the Strategic Operations Manager for Catering explained how the coffee sales were for a good cause. All money went to a cancer charity, Macmillan Support. It made the outrageous price slightly more palatable.

David McKenzie, our correspondent, actually tried the coffee. He seemed to like it but confessed that it just tasted like good coffee. Worth a hundred bucks? He didn't think so.

But the place where the cat pooh coffee really caused a stir was in the CNN London newsroom. Our report was given priority in the editing queue. I was obliged to explain to give all the gory details to my colleagues about the delicate origins of this extraordinary coffee and we actually ended up buying a $100 tin for the anchors to try on air. 

But is it worth a hundred dollars a shot? Despite the seemingly painstaking production process and the rarity of this intriguing blend, it's a lot of money to spend on a cup of coffee, even if it is for charity. However if it prompts some people with well-lined pockets to donate, then it's probably an effective marketing ploy.

But I, for one, am well and truly bored of thinking and writing about cat dung coffee.