Since much of this energy comes from the utilisation of fossil fuels, wastage of food potentially contributes to unnecessary global warming as well as inefficient resource utilisation.
出自-2013年12月阅读原文
As long as we're consuming fossil fuels, we're putting out CO2,"says Klaus Lackner, a geophysicist at Columbia, University" We cannot let the CO2 in the atmosphere rise indefinitely.
出自-2012年6月阅读原文
They found fossils of microscopic marine plants which suggest that the region was once open ocean not solid ice.
出自-2010年12月听力原文