The greenhouse gas emissions related to human activities on earth are directly impacting on environmental and meteorological system of our planet. Current concentration of greenhouse gases (GHG) in our atmosphere is about 430 ppm (particle per million) of CO2 equivalent. Global level of CO2 concentrations have passed 400ppm. Before the industrial revolution there was only 280 ppm. Secure level used to be set at 350ppm by most climate scientists. The evidence is clear: human activities are responsible for this steep increase, unprecedented in the history .
The cost of stabilizing Green House Gas (GHG) concentration at max 500-550 ppm CO2 is estimated at about 1% of the world’s annual GDP. It is high, but nothing compared to the expected losses in the absence of further action to deal with climate change: the OECD estimated that by 2100 there would be a GDP loss between 2 and 10%.
According to IRENA, doubling the share of renewable energies would reduce the monetary costs of externalities related to the use of fossil fuels by at least USD 1.2 trillion per year (4.2 trillion by 2030), and save up to 4 million lives annually.
On the other hand, according to a research published in the scientific journal Nature, in order to keep global warming under 2°C, 82% of coal reserves, 49% of gas and 33% of oil must be kept in the ground.
- Tracing anthropogenic carbon dioxide and methane emissions to fossil fuel and cement producers, 1854–2010, Climatic Change (2014) 122: 229, Heede
- Interactive map showing the companies responsible for climate change
- Carbon Majors Report 2017: 100 fossil fuels producers and nearly 1 trillion tones of greenhouse gas emissions
- Environmental Justice Atlas – Gas flaring in Nigeria
- The Guardian – Leave fossil fuels buried to prevent climate change
- IEA – World Energy Outlook 2012