What Does “Net-Zero Emissions” Mean? 8 Common Questions, Answered


The latest climate science is clear: Limiting global warming to 1.5 degrees C (2.7 degrees F) is still possible. But to avoid the worst climate impacts, global greenhouse gas (GHG) emissions will need to drop by half by 2030 and reach net-zero around mid-century.

Recognizing this urgency, a rapidly growing number of national government, local government and business leaders are making commitments to reach net-zero emissions within their jurisdictions or businesses. To date, over 80 countries have communicated such “net-zero targets,” including the world’s largest emitters (China, the United States, the European Union and India). On top of that, hundreds more regions, cities and businesses have set targets of their own.

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Sea-level legacy: 20cm more rise by 2300 for each 5-year delay in peaking emissions

02/20/2018 – Peaking global CO2 emissions as soon as possible is crucial for limiting the risks of sea-level rise, even if global warming is limited to well below 2°C. A study now published in the journal Nature Communications analyzes for the first time the sea-level legacy until 2300 within the constraints of the Paris Agreement. Their central projections indicate global sea-level rise between 0.7m and 1.2m until 2300 with Paris put fully into practice. As emissions in the second half of this century are already outlined by the Paris goals, the variations in greenhouse-gas emissions before 2050 will be the major leverage for future sea levels. The researchers find that each five year delay in peaking global CO2 emissions will likely increase median sea-level rise estimates for 2300 by 20 centimeters.

Sea-level legacy: 20cm more rise by 2300 for each 5-year delay in peaking emissions

Every delay in peaking emissions by 5 years between 2020 and 2035 could mean additional 20 cm of sea-level rise (Mengel et al 2018)

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Protein risk for millions from rising CO2 emissions – study

Last update 16:20 | 04/08/2017

About 150 million people risk a significant loss of protein if carbon dioxide emissions continue to rise, leaving children in the worst-affected countries more vulnerable to death and disease, according to new research.

Today, 76 percent of the world’s population gets most of its protein from plants, but higher CO2 emissions will reduce the amount of protein – as well as iron and zinc – in a range of staple crops, said researchers at the Harvard T.H. Chan School of Public Health. Tiếp tục đọc “Protein risk for millions from rising CO2 emissions – study”

How clean is clean coal?

16 November 2015Articles and blogs
Ilmi Granoff and Sam Pickard

ODI – The coal industry argues that more efficient and less polluting ‘advanced coal’ will help reduce carbon emissions and other pollution. What we can’t forget, ahead of next week’s World Coal Association meeting and OECD talks on coal policy, is that there are cheaper and cleaner options.

Burning coal generates about 40% of fossil fuel emissions. Current G7 and Chinese plants, alongside a dramatic expansion of coal power planned in the developing world, stand to blow our carbon budget.

To address this threat, the coal industry proposes replacing the most polluting coal technologies with advanced ‘high-efficiency, low emissions’ coal technologies. It claims that this will reduce emissions enough to keep global mean temperature under two degrees while taking advantage of coal as a cheap energy source.

Some also advocate that ‘climate finance’ should cover the price mark-up from conventional to advanced coal. For this to make sense, advanced coal would either need to be cleaner or cheaper than the alternatives – it is neither.

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