The article discusses the significant climate impact of contrails produced by aircraft and presents a potential solution for reducing their warming effects. It highlights that while eliminating CO2 emissions from aviation is costl...
About:
Hannah Ritchie is the author of the website 'Sustainability by Numbers', a Substack publication. She uses data and research to understand what really makes a difference in the field of sustainability. Her publication has tens of thousands of subscribers.
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The article discusses the potential of artificial intelligence (AI) to enhance weather forecasting, particularly in low-income countries where accurate forecasts are crucial for farmers. It highlights the significant improvements ...
The blog post discusses China's significant role in global energy and climate dynamics, highlighting its status as the largest emitter of CO2 and its rapid deployment of clean energy technologies. It summarizes findings from the r...
The Global Carbon Project released its annual budget, projecting a 1% increase in fossil emissions for 2025, while land use emissions are expected to decrease. Total emissions may remain stable around 42 billion tonnes. The report...
The blog post analyzes the global rollout of solar and wind power, highlighting China's significant lead in total generation compared to other countries. It discusses the importance of measuring solar and wind generation across di...
The article argues that limiting population growth is not a viable solution to climate change, as demographic changes occur over long timescales that do not align with the urgent need to reduce emissions. The author references the...
The blog post discusses the International Energy Agency's (IEA) 'World Energy Outlook 2025' report, focusing on the 'Current Policies Scenario' (CPS). It clarifies that the CPS is not a forecast but a scenario based on existing po...
The blog post explores the potential of geothermal energy, highlighting its low-carbon nature and availability. Despite vast underground heat resources, geothermal energy contributes less than 1% to the world's electricity supply....
The blog post discusses Ember Energy's recent report on solar panel exports from China and the rapid uptake of solar technology in Sub-Saharan Africa. It emphasizes the 'Electrotech Revolution,' which reframes the energy transitio...
Humanity can become the first sustainable generation by improving well-being while reducing environmental impact through innovative technologies and conscious policy choices.
In 2025, deforestation in the Brazilian Amazon decreased by 11% compared to the previous year, with 5,800 square kilometers cleared. This decline is attributed to the policies of President Lula da Silva, who took office in 2023, r...
The article discusses the carbon and energy footprint of using AI chatbots like ChatGPT and Google's Gemini. It concludes that individual usage contributes minimally to overall carbon footprints, with energy use per query signific...
The article discusses the common misconception that electric vehicle (EV) batteries degrade quickly, similar to mobile phone batteries. It explains the two types of battery degradation: calendar aging and cyclical aging, and prese...
The article examines the rising demand for electricity in the United States, comparing current and projected growth rates to historical data. It highlights that while electricity demand is expected to increase by about 3.5% annual...
The article discusses humanity's capacity to produce sufficient food for a growing population, emphasizing that while we can produce enough calories for more than 8 billion people, much of it is wasted or used for animal feed and ...
The author will broaden the focus of their Substack from solely environmental issues to include various global topics, renaming it 'By the Numbers' in 2026.
The article discusses the current state of global food production, highlighting that despite concerns about climate change, record harvests are expected in 2025 according to USDA projections. Key crops like corn, wheat, and soybea...
The author announces the upcoming publication of their second book, 'Clearing the Air: A Hopeful Guide to Solving Climate Change — in 50 Questions and Answers,' set to be released in the UK on September 18. The book aims to addres...
The author announces the release of their new book, 'Clearing the Air,' which addresses 50 common questions about climate solutions and future actions needed. The post encourages readers to order the book and mentions the upcoming...
The text discusses the generational divide on climate change, highlighting that people underestimate the number of individuals who believe in human-driven climate change and care about addressing it. It also explores the differenc...
The author discusses her experience writing on Substack, explaining the reasons for having her own Substack and the challenges of building an audience. She shares statistics on her subscribers and readership, and explains why she ...
The author discusses the environmental impact of meat consumption and the sustainability of wild meat as an alternative. They argue that wild meat is not a viable option for the general population due to the limited supply of wild...
China dominates the supply chain of solar panels and batteries, exporting huge amounts to the rest of the world. The main reason for the cheaper prices is due to a long-term industrial strategy, automation, and optimized productio...
The article discusses the carbon footprint of using ChatGPT, addressing concerns about its environmental impact. It provides a detailed analysis of the energy usage and carbon emissions associated with ChatGPT, concluding that ind...