# By the Numbers

> Using data and research to understand what really makes a difference.

- **Platform:** substack
- **Category:** Science
- **Subscribers:** 78K
- **Weekly growth:** +0.7%
- **Monthly growth:** +1.1%
- **Last updated:** 2026-10-14
- **URL:** https://hannahritchie.substack.com
- **Profile:** https://newsletterinsights.io/newsletter/hannahritchie

## Recent Posts

- [Many people are individually optimistic but think the world is falling apart](https://hannahritchie.substack.com/p/many-people-are-individually-optimistic)
- [What do American households use electricity for?](https://hannahritchie.substack.com/p/american-electricity-use)
- [Meat substitutes need to get a lot cheaper](https://hannahritchie.substack.com/p/meat-substitutes-price)
- [Electric cars: are countries going fully electric, or do people prefer plug-in hybrids?](https://hannahritchie.substack.com/p/plugin-hybrids)
- [How does electric car adoption vary across US states?](https://hannahritchie.substack.com/p/us-states-electric-cars)
- [Low-carbon energy does not have the same energy security risks as fossil fuels](https://hannahritchie.substack.com/p/energy-security-minerals)
- [Could low-carbon cement and steel be cheaper than we think?](https://hannahritchie.substack.com/p/cement-steel-premium)
- [Electrification is efficiency: The world will need less energy after the transition](https://hannahritchie.substack.com/p/electrification-energy-efficiency)
- [Biofuels: the US could switch to electric cars and solar power on just a fraction of the land](https://hannahritchie.substack.com/p/us-corn-biofuels)
- [Does that use a lot of energy?](https://hannahritchie.substack.com/p/does-that-use-a-lot-of)