In hosting these two events, the Global Your Excellency, Prime Minister Han Seung-Soo, Honourable Mayor Ahn Sang-Soo, Distinguished guests, Ladies and gentlemen, Friends,

It is wonderful to be back in my home country.

Let me begin by offering my sincere congratulations to Mayor Ahn and the City of Incheon.

Environment Forum as well as the Global Fair and Festival 2009, you show true global vision ? vision that underlines the importance of local government and cities in coping with the challenges of the 21st century.

Ladies and gentlemen,

As you know, Incheon is famous as the gateway to Korea.

But here today, I am especially proud as UN Secretary-General –and a Korean –to be able to say that Incheon is also a gateway to our common future.

The very fact that this most important Forum meets here today testifies to this.

The Songdo Convensia is one of the world's most green convention centres. And it is located in one of the world's most eco-friendly cities.

Songdo is remarkable not only for what it has become but for what it used to be.

People who grew up here remember the smokestacks and toxic fumes.

In a few short decades, these have given way to clean buildings and clear skies.

We are here today to recognize the connections between us and deal with a common problem. Of this, too, Songdo is a symbol.

I understand that Songdo modeled itself on the Swedish sister city of Hammarby Sjostad (SCHÖ-stad).

That city, too, used to be an industrial site before it transformed itself through ecofriendly development.

These two cities –one in Europe, the other in Asia –show visionary civic leadership. They understand that we have a choice: adapt or perish.

It is that simple.

Other cities around the world are taking this enlightened approach. Reykjavik in Iceland? Curitiba in Brazil... Kampala in Uganda... Sydney in Australia.

Whenever I visit these places, I am impressed.

People everywhere are accepting that we must all live cleaner, greener, more sustainable lives. This is our future.

I must admit that, as a Korean, Songdo occupies a special place in my heart.

It helps show how Korea has emerged as a world leader on greening the economy.

Some 80 per cent of Korea's $38 billion national stimulus package is dedicated to green growth? the highest percentage in the world.

Nearly a million green jobs will be created over the next four years.

This represents a fundamental shift in Korea's approach to building national prosperity.

I applaud this progress. I commend the visionary leadership of President Lee Myung Bak.

But Korea must do more.

The world is looking to Korea for leadership. This powerful emerging economy can serve as a bridge between developed and developing countries.

But to do this, Korea must set ambitious goals for reducing its own emissions.

I understand that the Korean Government is now seriously considering amending the mid-term target to reduce greenhouse gas emissions.

I urge you to aim high –be more ambitious commensurate with your economic development.

Korea long inspired others with its comeback spirit of renewal. After the Second World War, it arose to become one of the world's strongest economies.

Songdo was an industrial wasteland, but it transformed itself into one of the world's greenest cities.

Korea should now go further.

It should make itself a model of international engagement on climate change. Climate change is the fundamental threat to humankind.

It exacerbates all of the problems we face: poverty, disease, hunger and insecurity. It impedes progress toward the Millennium Development Goals. It deepens the food and energy crises.

That is the harsh reality.

But there is an upside: if we combat climate change with a sustainable, low-emissions approach, just like we see around us in Songdo, we can change the way countries develop.

We can foster green growth.

We can fight hunger and poverty while protecting the environment.

The downside is equally dramatic.

If we fail to act, climate change will intensify droughts, floods and other natural disasters.

Water shortages will affect hundreds of millions of people. Malnutrition will engulf large parts of the developing world. Tensions will worsen. Social unrest –even violence –could follow.

The damage to national economies will be enormous. The human suffering will be incalculable.

We have the power to change course. But we must do it now.

As we move toward Copenhagen in December, we must seal a climate change deal that secures our common future.

We have just four months. Four months to secure the future of our planet.

Any agreement must be fair, effective and based on science. And it must help vulnerable nations adapt to climate change.

Ladies and gentlemen,

The science is clear. We know what to do and we know how to do it. Songdo shows us the way.

What is needed is the political will.

That is why I am convening a summit of world leaders on 22 September.

Two years ago, only a handful of world leaders could talk about these issues.

Today leaders in all countries, on every continent, are aware of the threat we face.

This is great progress, for we need leadership of the very highest order.

Awareness is the first step. The challenge now is to act.

Since my first day as Secretary-General, I have spoken out about the grave climate change threat.

My words, at times, have been blunt.

When the leaders of the G-8 agreed in July to keep the global temperature increase within two degrees centigrade by the year 2050, I welcomed that step.

But I also said it was not enough.

I called for matching these long-term goals with ambitious mid-term emission reduction targets.

Let me be clear about what we need:

First industrialized countries must lead by committing to binding mid-term reduction targets on the order of 25 to 40 per cent below 1990 levels.

Unfortunately, the mid-term emission targets announced so far are not close enough to this range. This must change.

Second, developing countries need to take nationally appropriate mitigation actions in order to reduce the growth in their emissions substantially below business as usual.

Their actions must be measurable, reportable and verifiable.

Third, developed countries must provide sufficient, measurable, reportable and verifiable financial and technological support to developing countries.

This will allow developing countries to pursue their mitigation efforts as part of their sustainable green growth strategies and to adapt to accelerating climate impacts.

Significant resources will be needed from both public and private sources.

Developing countries, especially the most vulnerable, will collectively need billions of dollars in public financing for adaptation.

I am talking here about new money –not re-packaged overseas development assistance.

Fourth, we need an equitable and accountable mechanism for distributing these financial and technological resources, taking into account the views of all countries in decision-making.

Accomplishing all of this requires tough decisions. It will take flexibility and hard work to negotiate the most difficult issues.

Trust between developed and developing countries is essential.

When governments succeed in sealing a deal in Copenhagen, we will have shown the spirit of international solidarity. We will have shown leadership –political will.

Distinguished participants,

The city of Incheon has a remarkable history.

Here, in 1950, the Korean war came to a famous turning point, following a daring landing by UN forces under General Douglas MacArthur.

Against all the odds, the operation succeeded. Courage and leadership turned the tide.

Today, we need to turn a different tide –the tide of climate change. We need bold “outside of the box” thinking.

We need you.

You can shape the international debate and influence important decisions.

You can encourage countries to work together.

I promise you my best effort? my best effort to push, pull and cajole national leaders into acting in our common global interest.

Together, we truly can turn the tide, once again, here in Incheon. Thank you.