Big Picture

Solar Geo-Engineering

September 24, 2013

Dear EarthTalk: What is solar geo-engineering and how can it help stave off global warming?

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More Big Picture Stories

Rises in Early Puberty May Have Environmental Roots

Dear EarthTalk: Is it true that American kids are going through puberty earlier today than in previous generations, and are there any environmental causes for this?    – Paul Chase, Troy, NY Research indicates that indeed Americans girls and boys are going through puberty earlier than ever, though the reasons are unclear. Many believe our widespread…Read More

A Fierce Green Fire (new film)

Dear EarthTalk: What is the new documentary film A Fierce Green Fire about and what does the title refer to?                                                                                           — Gloria Howard, Washington, DC   A Fierce Green Fire is a new film documenting the rise of the modern environmental movement from the 1960s through the present day. It premiered at last year’s Sundance Film Festival…Read More

Human Overpopulation: Still an Issue of Concern?

Dear EarthTalk: Is it true that human overpopulation isn’t such a big issue any more as numbers are expected to start declining in a few decades?                                     – Melinda Mason, Boone, IA Ever since Thomas Malthus published “An Essay on the Principle of Population” in 1798, positing incorrectly that humans’ proclivity for procreation would exhaust the…Read More

Food Waste to Energy

Dear EarthTalk: Might another possible source for ethanol be discarded pastries from bakeries? For that matter, wouldn’t fermenting unsold bananas, oranges and apples from grocery store produce departments be able to provide an ample supply of fuel?    — Curious in Warren, PA Food waste is indeed an untapped resource with great potential for generating energy.…Read More

Environmental Internships

Dear EarthTalk: I understand that there are many internships available at environmental organizations, some involving working outdoors, some year-round with expenses paid. Where do I find these?                                                                                       – Jason Baar, Los Angeles, CA   Internships can provide professional experience and on-the-job training for individuals looking to enter the environmental field. There are numerous…Read More

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