Barcelona's solar energy regulations have moved the city to becoming an example of a sustainable city. Some of Barcelona's efforts include becoming the first European city to have a solar thermal ordinance and having one of the cleanest bus fleets in Europe.
The US began limited airstrikes against Islamist militants in Iraq Friday in an effort to stem the spread of violence. Despite Iraq's status as a major oil producer, oil markets haven't responded much yet to the renewed upheaval – suggesting that investors have grown accustomed to Mideast turmoil.
Solar panels typically cannot capture solar radiation properly unless the sun is straight on the solar panel. However, a company has developed material that can help solar panels capture sunlight from all angles.
The Obama administration is pushing green energy in Africa, hoping the continent will bypass coal on its road to development. But some say it's not realistic – or ethical – to expect emerging economies to sidestep fossil fuels.
Shipping crude oil by rail has led to a coal shortage across the US. Rail companies have more than doubled the amount of petroleum products being shipped each week, which has caused delays in shipping coal, corn, and grain.
A boom in domestic oil and gas production is keeping the US trade deficit down. Some politicians and analysts think increased production means it's time the US allow for crude oil exports, while others say exporting oil would harm American energy security.
Solar panels can lose their efficiency over time due to exposure to harsh elements. Now, scientists have developed a method using magnetic forces that could help keep solar cells efficient and clean.