Upgrading the energy efficiency of a building can be a major investment. Before making any decisions, it’s important to thoroughly research your options. Sometimes the more affordable ones can yield a greater ROI. That’s why it’s prudent to consider the expected retu

China and the US are two of the biggest emitters of greenhouse gases – combined, they are estimated to create nearly half of all of the emissions worldwide. In November 2014, China and the US met and pledged to reduce their greenhouse gas emissions: China – By 2030: cap carbon emissio