Ban Ki-moon

Climate change, demographics, water, food, energy, global health, women's empowerment - these issues are all intertwined. We cannot look at one strand in isolation. Instead, we must examine how these strands are woven together.

Climate change is destroying our path to sustainability. Ours is a world of looming challenges and increasingly limited resources. Sustainable development offers the best chance to adjust our course.

I have been very encouraged by President Obama's call to action on climate change both at his Inauguration and in the State of the Union Address. This is a global imperative. I also welcome President Obama's intention to pursue reductions in nuclear arsenals.

Around the world, climate change is an existential threat - but if we harness the opportunities inherent in addressing climate change, we can reap enormous economic benefits.

I treasure my meetings with individuals affected by autism - parents, children, teachers and friends. Their strength is inspiring. They deserve all possible opportunities for education, employment and integration.

Women and girls are disproportionately affected by landmines. They have different needs when it comes to education about risks. And they may face greater challenges when a family member is killed or injured.

Although more than 500 million maritime containers move around the world each year, accounting for 90 per cent of international trade, only 2 per cent are inspected. Strengthening customs and immigration systems is essential.

We must confront persecution faced by many Christian communities and the intolerance that plagues us. We must overcome anti-Semitism and the prejudice that divides us. We must defeat Islamophobia and the fears that weaken us.

Strangely, charity sometimes gets dismissed, as if it is ineffective, inappropriate or even somehow demeaning to the recipient. 'This isn't charity,' some donors take pains to claim, 'This is an investment.' Let us recognize charity for what it is at heart: a noble enterprise aimed at bettering the human condition.

Our work for human dignity is often lonely, and almost always an uphill climb. At times, our efforts are misunderstood, and we are mistaken for the enemy. There has been a clear erosion of respect for U.N. blue and our impartiality.

The U.N.'s impartiality allows it to negotiate and operate in some of the toughest places in the world. And time and again, studies have shown that U.N. peacekeeping is far more effective and done with far less money than what any government can do on its own.

At a time when we aim to accelerate our efforts to achieve the Millennium Development Goals and define a bold agenda for the period beyond 2015, the role of charity can and should grow. U.N. bodies such as the U.N. Volunteers Programme and UNICEF offer venues for people across the world to get involved.