In the midst of the current international debate on global warming, it is instructive to note that it has taken the United Nations and the international community some two generations to reach this point.

The imminence and severity of problems posed by the accelerating changes in the global climate are becoming increasingly evident. Heatwaves are increasing in severity, droughts and downpours are becoming more intense, the Greenland ice sheet is shrinking, sea levels are rising and the increasing acidification of the oceans is threatening to disrupt the marine food chain.

The issues of sustainability, particularly climate change and clean energy, as well as energy security and access, are compelling concerns of our times. Through the issues raised by climate change, the goal of sustainable development has been given a tangible core and a renewed sense of urgency.

Climate change is recognized as a most serious threat facing humanity. No one is immune to its effects. The impact of climate variability and climate change on human and natural systems poses serious challenges to our objective of reducing poverty and achieving sustainable development.

If there is one issue that strikes at the heart of my nation, Tuvalu, it is climate change. Tuvalu is a small coral atoll nation located in the middle of the South Pacific. Our lives are closely linked to the marine environment and we live off the bounty of the ocean, with fish being our main source of protein.

We have been trying to address the ill effects of modern energy-depleting technology by inventing new technologies in architecture. While such a quest is inevitable, I propose combining solutions developed by our ancestors with contemporary technological innovations to achieve significant results in sustainable architecture.

In an increasingly carbon-constrained world, solar energy technologies represent one of the least carbon-intensive means of electricity generation. Solar power produces no emissions during generation itself, and life-cycle assessments clearly demonstrate that it has a smaller carbon footprint from cradle-to-grave than fossil fuels.

China's massive industrial sector is an economic juggernaut, helping to drive national gross domestic product (GDP) growth rates of around 10 per cent per year. But while the country's highly productive factories and plants may be boosting national prosperity, their rapid expansion carries with it a serious environmental burden and costly energy inefficiencies that are increasingly becoming a barrier to China's sustainable development, thus contributing to climate change.

Twenty years after the Brundtland Report asserted it was in the common interest of all peoples and nations to establish policies for sustainable development, the pace of sustainability is finally accelerating. Notwithstanding a number of serious political and security issues that politicians are struggling to effectively address, the case for sustainability in a global context has become more apparent, and even mainstreamed in some countries, during the last few years.

Sustainable development is an important requirement of the Clean Development Mechanism (CDM) set up under the Kyoto Protocol. It helps to maintain environmental integrity and should be assessed rigorously prior to any investment in a CDM project. The benefits include certainty in CDM application, reduction of risk to investors, developers and owners, and the provision of cost-free assistance to developing countries, which could reduce the enormous divide between the North and the South.