Following the start of the industrial revolution, in 1824 Jean-Baptiste Fourier discovered a global warming “greenhouse” effect and in 1896 Swedish and American scientists independently concluded that CO2 was the likely cause of global warming. Nearly 90 years later in 1987 the WMO and UNEP established a scientific advisory body called the Intergovernmental Panel on Climate Change (IPCC) which issued its First Assessment Report in 1990, finding that the planet had warmed by 0.5°C in the past century and would rise further by 0.3°C per decade in the 21st century, accompanied by global mean sea level rises of 6 cm per decade. In 2007 the IPCC released its Fourth Assessment Report, concluding with 90% confidence that human activity is causing climate change and that “Global GHG emissions due to human activities have grown since pre-industrial times with an increase of 70% between 1970 and 2004.”
In 2008 our planet was estimated to contain 385 ppm (parts per million) of CO2 in its atmosphere, the highest concentration of CO2 for more than 630,000 years. This is widely agreed to be due to human industrial advancement, specifically the production and consumption of power from the burning of fossil fuels that are estimated to have caused around 85% of CO2 emissions. It is known that global temperature increase must be kept within 2°C to prevent an irreversible chain reaction of greenhouse gas release from forests, peat bogs, Siberian permafrost and oceans, which would change the planet’s ecosystems irrevocably. To ensure this temperature rise does not occur concentration of CO2 must not pass 450 ppm, which means reducing CO2 emissions to 60% below 1990 levels before 2030.
Tags: Climate Change, renewable, Solar
