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After a frantic day of negotiations, world leaders agreed to the Copenhagen Accord on COP15's last day. While all admit it is inadequate to the task, the Accord is a significant first step in engaging the world's largest emitters in the global effort to slash carbon emissions.

Here are the prepared remarks of President Barack Obama's address at COP15. The speech was delivered two hours late, after last-minute negotiations with nearly 20 world leaders. Obama included a few telling ad-libs such as stating that the pieces of an accord "should now be" instead of "are" clear.

On the penultimate day of the Copenhagen climate talks, Secretary of State Hillary Rodham Clinton boosted the chance for a deal considerably by offering a first: a US commitment to supply funds to a long-term financing plan for adaptation.

Today saw the first direct involvement in the talks by heads of state, a much needed boost after weary negotiators worked through the night to finalize their draft texts. Later in the day, word came of a pending political proposal from the Danish hosts, and a financing plan to reduce deforestation.

On the last full day before the kick-off of the high-level segment of this conference, Yvo de Boer and Connie Hedegaard forcefully made the case that negotiators had limited time to reconcile major issues if world leaders are to have an agreement to sign on Friday.

The second week of the Copenhagen climate talks began with Connie Hedegaard convening parties for informal talks. Much work remains, but heads of state begin arriving Tuesday night, including Prime Minister Gordon Brown, giving hope that outstanding issues can be resolved with political muscle.

In an exclusive video message delivered to delegates attending a COP15 meeting at Hamlet's Kronborg Castle just outside Copenhagen this evening, President Bill Clinton said:

Tomorrow at Hamlet's Kronborg Castle, Danish Crown Prince Frederik joins forward-thinking business leaders working to ensure that the answer to the question "To Be or Not to Be? New Leadership for a Sustainable Economy," becomes a resounding yes during final negotiations at the COP15 next week.

On Friday, the chairs of the two negotiating tracks at COP15 released draft texts that will guide the last week of the talks. The texts leave big questions unanswered. But, with 115 world leaders to descend on Copenhagen on COP15's closing days, negotiators remain confident a deal can be struck.

On Day 4 at the Bella Center, the suspension of the Conference of the Parties stalled work in the plenary hall, but UN climate chief Yvo de Boer said negotiators had reached "emerging agreement" on an architecture to deploy low-carbon technology to the developing world.

Day 3 at the Bella Center was marked by continued hand-wringing over the importance of the "Danish text." The day also saw the floating of a new long-term financing proposal and the arrival of the top US negotiator, Todd Stern.

While the leak of the so-called "Danish text" threatened to overwhelm the conference with a non-story, day two really revealed more detail about a COP15 prevailing narrative: It's all about the money.

The UN Climate Change Conference (COP15) opened today with speeches by Danish Prime Minister Lars Løkke Rasmussen and UNFCCC head Yvo de Boer. To keep you up to date on the latest news from the Bella Center, please return to this website each evening for news and analysis in my COP15 Daily Brief.

As COP15 convenes today, Danish Prime Minister Lars Løkke Rasmussen hosts a Special Opening Ceremony to showcase civil society input. The event was organized in collaboration with the Copenhagen Climate Council and Global Observatory.

Failure or success at COP15 will require the private sector to help guide the economy onto a sustainable path. On December 12, the Copenhagen Climate Council and the UN Global Compact will bring together business leaders at Hamlet's Kronborg Castle to help kick-start the low-carbon revolution.

Actress Cate Blanchett and Copenhagen Climate Council Chairman Tim Flannery have launched an eleventh-hour appeal to global citizens to join them in pushing for the strongest possible outcome at the U.N. Climate Change Conference in Copenhagen, which opens in less than two weeks.

Connie Hedegaard, one of the most powerful voices working to broker a deal at next month's climate change talks in Copenhagen, has been nominated to join the European Commission. Hedegaard, Denmark's climate minister, is rumored to be in line to become the E.U.'s first climate commissioner.

The University of California recently announced a low-carbon roadmapping process to mobilize a campus-wide effort to identify critical technology projects and accelerate the shift to an efficient, low-carbon economy.

Will green energy and electric cars drive a new global climate change plan? Yes, say Copenhagen Climate Council members Shai Agassi, CEO of Better Place, and Anders Eldrup, CEO of DONG Energy, this week on the PBS series "NOW."