Dar es Salaam, Tanzania (CNN) -- An estimated 3 billion people -- nearly half the world's population -- still use an open fire as their primary source of energy for cooking and heating.
But there's a problem: the smoke.
"You have respiratory issues, lung disease, you've got pneumonia, and you've got longer-term issues like cancer and heart disease as well that can result from exposure to indoor air pollution," said Radha Muthiah, executive director of the Global Alliance for Clean Cookstoves. ... Read more about When cooking can be deadly
Global carbon dioxide emissions from burning fossil fuels have increased by 49 per cent in the last two decades, according to the latest figures by an international team, including researchers at the Tyndall Centre for Climate Change Research, University of East Anglia.
Dramatic and unprecedented plumes of methane – a greenhouse gas 20 times more potent than carbon dioxide – have been seen bubbling to the surface of the Arctic Ocean by scientists undertaking an extensive survey of the region.
The global output of heat-trapping carbon dioxide has jumped by a record amount, according to the US department of energy, a sign of how feeble the world's efforts are at slowing man-made global warming.
The figures for 2010 mean that levels of greenhouse gases are higher than the worst case scenario outlined by climate experts just four years ago.
For two decades, the world’s governments have failed to meet their own commitment to reduce emissions of carbon dioxide, the main heat-trapping gas. As frustration builds among scientists, some of them have begun to argue for research on a potential last-ditch option in case global warming starts to get out of control. It is called geoengineering — or directly manipulating the Earth’s climate.