A major climate meeting opened on Monday in the Thai capital, Bangkok, with delegates debating how to rein in rising greenhouse-gas emissions that could threaten hundreds of millions with hunger and disease in the coming decades.
For the rest of the week, hundreds of scientists and diplomats attending the Inter-governmental Panel on Climate Change meeting will work to finalise a report detailing a range of technological options to mitigate rising levels of carbon dioxide, methane and other heat-trapping gases.
”The time to act is now,” Chartree Chueyprasit, a deputy secretary in Thailand’s Ministry of Natural Resources and Environment, told delegates.
”Global warming has increasingly become a hot [issue] which requires harmonised cooperating between all nations,” he said. ”The IPCC has realised the scientific knowledge to provide the necessary solutions.”
The draft report, which will be amended following comments from dozens of governments, says emissions can be cut below current levels if the world shifts away from carbon-heavy fuels like coal, invests in energy efficiency and reforms the agriculture sector.
”The science certainly provides a lot of compelling reasons for action,” said Rajendra Pachauri, chairperson of the climate change panel. ”But what action and when is what the government will have to decide.”
Two previous IPCC reports this year painted a dire picture of a future in which unabated greenhouse-gas emissions could drive global temperatures up as much as six degrees Celsius by 2100.
Even a two-degree-Celsius rise could subject up to two billion people to water shortages by 2050 and threaten extinction for 20% to 30% of the world’s species, the IPCC said.
Scientists have said that global warming could increase the number of hungry in the world in 2080 by between 140-million and one billion by contributing to widespread droughts and flooding.
Diseases like malaria, diarrhoea and dengue fever could spread as temperatures rise and weather becomes increasing erratic, affecting the poorest of the world’s poor.
The third report stresses that the world must quickly embrace a basket of technological options — already available and being developed — just to keep the temperature rise to two degrees Celsius.
Making buildings more energy efficient, especially in the developing world, through better insulation, lighting and other steps, could also lead to significant cuts as would converting from coal to natural gas, nuclear power and renewable energy such as wind.
Less significant but also important would be steps to make motor vehicles more fuel-efficient, reduce deforestation and plant more trees as a carbon ”sink”, absorbing carbon dioxide. Even capturing methane emitted by livestock and its manure would help, the draft report says.
Over the next century, it says, technology such as hydrogen-powered fuel cells, advanced hybrid and electric vehicles with better batteries and carbon sequestration — whereby carbon emissions are stored underground — will become more commercially feasible.
”The most important thing is to improve energy efficiency,” said Jean-Pascal van Ypersele, a member of the Belgian delegation on the sidelines of the conference.
”There is a lot of energy wasted everywhere in the world,” he said. ”In the long-term we won’t have fossil fuels anymore. We have to improve the way we use renewable energy.” — Sapa-AP