REUTERS/Yuri Gripas Climate scientist Katharine Hayhoe says she’s learned more about which of her behaviors contribute most to warming the planet by using a carbon footprint calculator. While she drives a plug-in car and uses energy-saving LED light bulbs in her home, she says that neither of those are the most important thing she’s done to reduce her contribution to a warming Earth . Instead, she now insists that when she must travel for work, she books more than one event at a time. Recently, the news about our planet’s health hasn’t been great. Studies have pointed out that we may be headed toward a "hothouse" Earth scenario – a catastrophic tipping point that could cause seas to rise another 200 feet , inundating many major cities. Scientists and engineers have now started proposing that we build giant Antarctic sea walls to keep melting glaciers from slamming into our shores . But not everyone is wallowing in despair. One climate scientist in Lubbock, Texas, is making her own set of changes at home to help keep the planet cool. It started with a lightbulb "The first thing I did, was I said ‘Ok, let’s just look at the light […]

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