“Without immediate and deep emissions reductions across all sectors, it will be impossible.” “It’s now or never, if we want to limit global warming to 1.5☌ (2.7☏),” said Skea. Even if we do this, it is almost inevitable that we will temporarily exceed this temperature threshold but could return to below it by the end of the century.
In the scenarios we assessed, limiting warming to around 1.5☌ (2.7☏) requires global greenhouse gas emissions to peak before 2025 at the latest, and be reduced by 43% by 2030 at the same time, methane would also need to be reduced by about a third. Response options can benefit biodiversity, help us adapt to climate change, and secure livelihoods, food and water, and wood supplies. However, land cannot compensate for delayed emissions reductions in other sectors. Achieving net zero will be challenging and will require new production processes, low and zero emissions electricity, hydrogen, and, where necessary, carbon capture and storage.Īgriculture, forestry, and other land use can provide large-scale emissions reductions and also remove and store carbon dioxide at scale. This sector accounts for about a quarter of global emissions. For basic materials, including steel, building materials and chemicals, low- to zero-greenhouse gas production processes are at their pilot to near-commercial stage. Reducing emissions in industry will involve using materials more efficiently, reusing and recycling products and minimising waste. “Action in this decade is critical to capture the mitigation potential of buildings.” “We see examples of zero energy or zero-carbon buildings in almost all climates,” said IPCC Working Group III Co-Chair Jim Skea. There are options for established, rapidly growing and new cities. These can be achieved through lower energy consumption (such as by creating compact, walkable cities), electrification of transport in combination with low-emission energy sources, and enhanced carbon uptake and storage using nature. “The evidence also shows that these lifestyle changes can improve our health and wellbeing.”Ĭities and other urban areas also offer significant opportunities for emissions reductions. This offers significant untapped potential,” said IPCC Working Group III Co-Chair Priyadarshi Shukla. “Having the right policies, infrastructure and technology in place to enable changes to our lifestyles and behaviour can result in a 40-70% reduction in greenhouse gas emissions by 2050. This will involve a substantial reduction in fossil fuel use, widespread electrification, improved energy efficiency, and use of alternative fuels (such as hydrogen). Limiting global warming will require major transitions in the energy sector. We have options in all sectors to at least halve emissions by 2030 It is the third instalment of the IPCC’s Sixth Assessment Report (AR6), which will be completed this year. The Summary for Policymakers of the IPCC Working Group III report, Climate Change 2022: Mitigation of climate change was approved on Ap, by 195 member governments of the IPCC, through a virtual approval session that started on March 21. If these are scaled up and applied more widely and equitably, they can support deep emissions reductions and stimulate innovation.” There are policies, regulations and market instruments that are proving effective. “I am encouraged by climate action being taken in many countries. We have the tools and know-how required to limit warming,” said IPCC Chair Hoesung Lee. The decisions we make now can secure a liveable future. An increasing range of policies and laws have enhanced energy efficiency, reduced rates of deforestation and accelerated the deployment of renewable energy. Since 2010, there have been sustained decreases of up to 85% in the costs of solar and wind energy, and batteries. However, there is increasing evidence of climate action, said scientists in the latest Intergovernmental Panel on Climate Change (IPCC) report released today. Without immediate and deep emissions reductions across all sectors, limiting global warming to 1.5☌ is beyond reach. GENEVA, Apr 4 – In 2010-2019 average annual global greenhouse gas emissions were at their highest levels in human history, but the rate of growth has slowed. The evidence is clear: the time for action is now.
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