The solar powered tree occupies about 4 sq ft of land compared to 400 sq ft required by a conventional solar photovoltaic layout.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/solar-power-tree-developed-solve-worlds-energy-problems
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/daily-news-analysis-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/solar-energy
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/renewable-energy
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/council-scientific-and-industrial-research-csir
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy-technology
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/power-industry
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy