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The authors say fossil-fuel emissions should peak by 2020 at the latest and fall to around zero by 2050 to meet the UN\u2019s Paris Agreement\u2019s climate goal of limiting the global temperature rise to \u201cwell below 2\u00b0C\u201d from preindustrial times.<\/p>\n
A \u201ccarbon law\u201d approach, say the international team of scientists, ensures that the greatest efforts to reduce emissions happens sooner not later and reduces the risk of blowing the remaining global carbon budget to stay below 2\u00b0C.<\/p>\n
The researchers say halving emissions every decade should be complemented by equally ambitious, exponential roll-out of renewables. For example, doubling renewables in the energy sector every five-seven years, ramping up technologies to remove carbon from the atmosphere, and rapidly reducing emissions from agriculture and deforestation.<\/p>\n
\u201cWe are already at the start of this trajectory. In the last decade, the share of renewables in the energy sector has doubled every 5.5 years. If doubling continues at this pace fossil fuels will exit the energy sector well before 2050,\u201d says lead<\/a> author Johan Rockstr\u00f6m director of the Stockholm Resilience Centre, Stockholm University.<\/p>\n The authors pinpoint the end of coal in 2030-2035 and oil between 2040-2045 according to their \u201ccarbon law\u201d. They propose that to remain on this trajectory all sectors of the economy need decadal carbon roadmaps that follow this rule of thumb, modeled on Moore\u2019s Law.<\/p>\n The paper notes that a \u201ccarbon law\u201d offers<\/a> a flexible way to think about reducing carbon emissions. It can be applied across borders and economic sectors, as well as both regional and global scales.<\/p>\n Hans Joachim Schellnhuber, director of the Potsdam Institute for Climate Impact Research, says, \u201cOur civilization needs to reach a socio-economic tipping point soon, and this roadmap shows just how this can happen. In particular, we identify concrete steps towards full decarbonization by 2050. Businesses who try to avoid those steps and keep on tiptoeing will miss the next industrial revolution and thereby their best opportunity for a profitable future.\u201d<\/p>\n Co-author Nebojsa Nakicenovic, deputy director general of the International Institute for Applied Systems Analysis (IIASA) and member of the Earth League, said \u201cHumanity must embark on a decisive transformation towards complete decarbonization. The \u2018Carbon law\u2019 is a powerful strategy and roadmap for ramping down emissions to zero so as to stay within the global carbon budget for stabilizing climate to less than 2\u00b0C above preindustrial levels.\u201d<\/p>\n Joeri Rogelj, also at IIASA, said, \u201cThe carbon law outlines a global path towards achieving climate and sustainability goals in broad yet quantitative terms. It sketches a general vision of rapid emission reductions in conjunction with the development of sustainable carbon dioxide removal options. It clearly communicates that no single solution will do the job, and that this deep uncertainty thus implies starting today pursuing multiple options simultaneously.\u201d<\/p>\n Malte Meinshausen, director of the Climate & Energy College at the University of Melbourne, said \u201cRegions that make way for future-proof renewable energy<\/a> and storage investments will turn a zero-emissions future into an economic opportunity. While for years, we\u2019ve seen the ramp-down of incumbent fossil technologies only as burden, the other side of the coin is now finally visible: lower costs, more jobs and cleaner air.\u201d<\/p>\n Following a \u201ccarbon law\u201d, which is based on published energy scenarios, would give the world a 75% chance of keeping Earth below 2\u00b0C above pre-industrial temperatures, the target agreed by nations in Paris in 2015.The paper \u201cA roadmap for rapid decarbonization\u201d appears in Science as a peer reviewed \u201cpolicy forum article\u201d on 24 March 2017.<\/p>\n<\/div>\n [ad_2]
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