STANFORD Magazine: SAGE

Get answers to your sustainability questions from SAGE, a Stanford project dedicated to providing sound environmental advice and information to alumni and other members of the Stanford community. Students from environmental communications course IPER 200 look forward to answering your questions—and bridging the gap between scientific understanding and public awareness. More about SAGE »

Recently Answered

I'd like to know the differences in environmental impact between mined diamonds and those that are lab-created. Besides the obvious social upsides (avoiding war-torn producer countries, child labor in mines, etc.), what are the environmental benefits?

Asked by Gordon Haupt
Is it really more economical to use electric space heaters where the people are than to heat the whole house?

Asked by Mary Fahnestock
The average global temperature has dropped two degrees in the past two years. Crop yields are projected to decline 10 percent in 2009 due to cooler growing conditions. Approximately 85 percent of CO2 is not from man-made sources. Countries outside the United States produce the majority of CO2 and their growth rate is accelerating. If global warming is actually due to man, rather than sunspots or other natural causes, how can the current efforts to minimize CO2 emissions before we have replacement technology be cost justified?

Asked by Daniel Wildermuth
What is the impact of a person becoming a vegetarian on global warming?

Asked by Virginia Troyer
I have compact fluorescent (CFL) bulbs in the ceiling fan in the kitchen. Should I turn this fixture off when I leave the room for only 5-15 minutes?

Asked by Paula Giese
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