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Great naturalist

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preserve, grove, sanctuary +1 each, oracle +2

Passive: Within two tiles, +1 appear for all tiles in that city

Classical
Pei Xiu Civilian units and recon units +1 Movement
Meng Chang Pearly resources +4 gold
Zhang Hua Immediately build 1 grove in the area. Grove +1 Culture

Medieval
Xu Xiake The Travels of Xu Xiake
Gao Wenjian Forest +1 Gold
Li Daoyuan Commentary on the Waterways Classic

Renaissance
Réaumur Reef +2 science
Carl von Linné Preserve +1 Amenities
Alfred Russel Wallace Rainforest +1 science

Industry
John Muir Create 1 naturalist
Fabre Souvenirs Entomologiques
Karl Ritter von Frisch Honey +4 culture

Modern
Robert Swinhoe Get 2 Envoys and 1 Governor title
Rachel Carson Under The Sea-Wind Silent Spring
Konrad Zacharias Lorenz Immediately build 1 Sanctuary in the area. Sanctuary +2 Science

Atomic
Arvid Pardo Coast +1 Science
Odum Swamp +4 Science
Charles Sutherland Elton Snow +2 Food and Production

Information
Jenny Goodall My life with the chimpanzees Reasons for Hope
Gifford Pinchot +1 Diplomacy Points
Ma Shijun +25% food in all cities