1.
The Conservation Volunteers
2.
The Cyprus Institute
3.
The Earth Foundation
2020
4.
The Eco Centre
5.
The Ecology Center
6.
The Footprint Trust Charity
7.
The Freshwater Trust
8.
The Gaia Project
9.
The Horticultural Society of New York
10.
The Institute for Agricultural and Urban Ecological Projects at the Humboldt University in Berlin
11.
The Japan Home Gardening Association
12.
The Morton Arboretum