15,000 scientists from over 180 countries issue a dire warning to humanity that “time is running out” to stop business as usual

Reassessing warning issued 25 years ago, the scientists’ “second notice” to humanity warns of “widespread misery and catastrophic biodiversity loss” unless business-as-usual is upended “Humanity is not taking the urgent steps needed to safeguard our imperiled biosphere,” over 15,000 scientists warned in a letter published Monday. (Photo: NASA) Over 15,000 scientists hailing from more than 180 countries just issued a …

Historical GHG emissions, responsibility

Figures from the World Resources Institute show the top 10 nations as measured by their cumulative emissions between 1850 and 2007. The US tops the list by a wide margin – though Chinese emissions have risen significantly since these data were assembled. 1. US: 339,174 MT or 28.8% 2. China: 105,915 MT or 9.0% 3. Russia: 94,679 MT or 8.0% 4. Germany: …

Reforestation project in the Brazilian Amazon is using a new technique for planting trees that results in more, stronger plants–and hopes to cover 70,000 acres in new forests

Developed in Brazil only a few years ago, the new planting technique is called muvuca. “In Portuguese, it means a lot of people in a very small place,” says Rodrigo Medeiros, Conservation International’s vice president of the Brazil program and the lead on the ground.  The muvuca strategy demands that seeds from more than 200 native forest species are spread over every square meter of burnt and …

City framework for deep decarbonization. How much do citizens, businesses and municipal government spend on fossil fuels every year, where it goes and what it could otherwise fund if it were instead invested in the city’s clean energy future

USDN and Carbon Neutral Cities Alliance Framework for Long-Term Deep Carbon Reduction Planning A core function of CNCA is to facilitate other cities’ understanding of how leading-edge cities are planning for long-term deep carbon reductions, and enable cities to take a more robust, consistent, equitable and comprehensive approach to carbon neutral planning and implementation. In 2015, we developed a streamlined Deep Carbon …

Interpreting 1.5C

In addition to climate finance, the Paris Agreement also committed signatories to the aspirational target of limiting global temperature rise to 1.5C. However, the text does not explicitly spell out how the limit should be interpreted – potentially creating confusion when communicating how achievable 1.5C is and the mitigation effort required. In a guest post, Dr Joeri Rogelj, from the …

Conservation, restoration, & land management actions across global forests, wetlands, grasslands, and ag lands can provide 37% of cost-effective CO2 mitigation needed through 2030 for a >66% chance of holding warming to below 2 °C

PNAS: Natural Climate Solutions  Most nations recently agreed to hold global average temperature rise to well below 2 °C. We examine how much climate mitigation nature can contribute to this goal with a comprehensive analysis of “natural climate solutions” (NCS): 20 conservation, restoration, and/or improved land management actions that increase carbon storage and/or avoid greenhouse gas emissions across global forests, …

Interpreting the Paris Agreement’s 1.5C temperature limit

Dr Joeri Rogelj is a research scholar at the International Institute for Applied Systems Analysis (IIASA) in Austria, and a coordinating lead author of the IPCC’s Special Report on 1.5C. Dr Carl-Friedrich Schleussner is head of climate science and impacts at Climate Analytics, and is on the steering committee of the initiative Half a degree Additional warming, Prognosis and Projected Impacts (HAPPI). In Carbon Brief …