Image: Rochester Factory Credit: Ben Reierson License: CC BY 2.0
|
Reducing carbon emissions is a
major global challenge. Over the last four decades the amount of carbon dioxide
equivalent (CO2e) emitted annually into
the atmosphere has increased from 32 billion tonnes to 45 billion tonnes and CO2e concentrations
in the atmosphere are increasing at an annual rate of 1 part per million. If
these trends continue, scientists expect that surface climate temperatures will
increase to levels exceeding 2 degrees Celsius (2oC) above
pre-industrial levels. In turn, this could contribute to accelerate melting of glacial
ice, higher tides, additional flooding and a host of other volatile climate
related events.
Reducing CO2 emissions
has been a legal obligation for governments under the Kyoto agreement,
which has recently been extended from 2013 to 2020. It is a major challenge
because, at a global level, although we are reducing carbon intensity per
financial unit of GDP by about 1 percent per year, global GDP itself is growing
at over 3 percent. So it is reasonable to expect that carbon emissions will
continue to grow at 2 percent per annum. Any growth in emissions risks
inflating temperatures closer to and even above the + 2oC target, which governments have set in the
climate negotiations at the UN.