Tag Archives: carbon space

Climate Change – Keep the Climate, Change the Economy: Sagar Dhara

Guest post by SAGAR DHARA

Contrasting outcomes of recent global warming meetings

Two recent meetings on global warming, one scientific and the other political, are of great public interest as they have a bearing on human society’s future course to become a sustainable global community. The meetings stand in sharp contrast with each other in terms of the clarity of their outcomes.

The first meeting was held by the Intergovernmental Panel on Climate Change (IPCC), a body of over 2,000 scientists. IPCC released its fifth assessment’s synthesis report in Copenhagen end-October 2014. The report states unequivocally that “Human influence on the climate system is clear.” Further, it warns that the emission of another 1,000 Giga tonnes1 (Gt) of carbon dioxide (CO2), referred to as the carbon space, is likely to raise average global surface temperatures by 2oC above pre-industrial times. This is considered dangerous to the environment and human society.

Since the industrial revolution began in the mid-18th Century, humans have used 35% of the known 1,700 Gt of conventional fossil fuel reserves, and cut a third of the then existing 60 million km2 of forests to emit 2,000 Gt CO2. The consequent 0.85oC average global temperature rise over pre-industrial times has triggered significant changes in the physical, biological and human environments. For example, rainfall variation has increased, extreme weather events are more frequent, pole-ward migration of species is noticeable and their extinction rate is higher, human health, food and water security are at greater risk, crop yield variations are higher, a 19 cm mean sea rise and a 40% reduction in Arctic’s summer ice extent have occurred over the last century, glaciers have shrunk by 275 Gt per annum in the last two decades, and social conflicts have increased. Continue reading Climate Change – Keep the Climate, Change the Economy: Sagar Dhara