Reference:
DeFries, R.S., T. Rudel, M. Uriarte, and M. Hansen (2010). Deforestation driven by urban population growth and agricultural trade in the twenty-first century.Nature Geoscience, doi:10.1038/ngeo756.
+ Article abstract [external link]
+ City Dwellers Drive Deforestation in 21st Century, Scientific American [external link]

STELLA: A DIY Handheld Scientific Instrument
If you are looking for a do-it-yourself (DIY) handheld spectrometer, you need to meet STELLA. STELLA (Science and Technology Education for Land/Life Assessment) is a portable scientific instrument developed by