Data:
Landsat Data
NBER Data
World Bank Data
Center for Science in the Earth System
USDA - National Agricultural Statistics Service
Environmental Economics:
ResEcon (Land & Resource Economics Network)
Association of Environmental and Resource Economists
Agricultural & Applied Economics Association
Water:
Circle of Blue
Global Water Forum
International Water Resource Economics Consortium
Economics Blogs:
Environmental and Urban Economics
Becker-Posner Blog
Aquanomics
Environmental Economics
Best of 100:
FB 13
WJ 8