A University of Wisconsin-Madison analysis of the emissions generated from shipping freight via truck or by train shows that shipping by train delivers a big reduction in CO2 emissions. Researcher Erica Bickford said much of the environmental benefit boils down to simple efficiency. For each ton of freight they carry, trucks go about 150 miles […]
Scientists have for years theorized that high concentrations of greenhouse gases could have helped Earth avoid global freezing in its youth by allowing the atmosphere to retain more heat than it lost. Now, analysis of the world’s oldest sedimentary rocks has revealed the first preliminary field evidence supporting this theory. “Our study shows the greenhouse […]
