Dr. Hannah Ritchie

Hannah completed her PhD in GeoSciences at the University of Edinburgh.

26 posts

Access to Energy

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Dec 1, 2025 — 9 min read

At a global level, the percentage of people with access to electricity has been steadily increasing over the last few decades.

Threats to Wildlife

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Nov 27, 2025 — 6 min read

Explore the latest data and research on the biggest threats to global wildlife.

Biodiversity and Wildlife

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Nov 26, 2025 — 8 min read

Mammals

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Nov 25, 2025 — 46 min read

Birds

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Nov 24, 2025 — 9 min read

Fish

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Nov 23, 2025 — 6 min read

Coral Reefs

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Nov 22, 2025 — 50 min read

Living Planet Index

by Dr. Hannah Ritchie and Dr. Max Roser Nov 21, 2025 — 19 min read

Extinctions

by Dr. Hannah Ritchie and Dr. Max Roser Nov 20, 2025 — 27 min read

Poaching and Wildlife Trade

by Dr. Hannah Ritchie and Dr. Max Roser Nov 19, 2025 — 9 min read

Habitat Loss

by Dr. Hannah Ritchie and Dr. Max Roser Nov 18, 2025 — 16 min read

Protected Areas and Conservation

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Nov 17, 2025 — 17 min read

Water Use and Stress

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Nov 16, 2025 — 11 min read

Sanitation

by Dr. Max Roser and Dr. Hannah Ritchie in OWD Nov 15, 2025 — 7 min read

Renewable Energy

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Nov 14, 2025 — 11 min read

Plastic Pollution

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Nov 13, 2025 — 32 min read

Outdoor Air Pollution

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Nov 12, 2025 — 20 min read

Oil Spills

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Nov 11, 2025 — 3 min read

Environmental impacts of food production

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Dec 5, 2023 — 30 min read

CO₂ and Greenhouse Gas Emissions

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Apr 4, 2023 — 10 min read

Ozone Layer

by Dr. Max Roser and Dr. Hannah Ritchie in OWD Feb 10, 2023 — 22 min read

Clean Water

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Jan 3, 2023 — 7 min read

Indoor Air Pollution

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Jul 7, 2022 — 12 min read

Fossil Fuels

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Jul 6, 2022 — 21 min read

Air Pollution

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Jul 2, 2022 — 6 min read

Natural Disasters

by Dr. Hannah Ritchie and Dr. Max Roser in OWD Jun 9, 2022 — 25 min read

Success! Your email is updated.

Your link has expired

Success! Check your email for magic link to sign-in.

Popular tags

Law Knowledge Government Logic State Nature Definition Philosophy Physics Change