New York Times: Climate change may be one of the major issues in the 2016 presidential campaign. According to a recent poll by the New York Times, two-thirds of Americans favor political candidates who propose to take action on global warming. One presidential hopeful to take up the challenge is Hillary Clinton, who on Monday announced an ambitious goal to produce 33% of the US’s electricity from renewable sources by 2027. She has called for the installation of a half-billion solar panels by 2020 and for the generation of enough carbon-free energy to power every US home within a decade. Despite her strong support for green energy, however, some environmentalists say she must also develop a strong stance against fossil-fuel projects, such as the Keystone XL pipeline, on which she has so far refused to express an opinion, citing her role in evaluating the project when she was secretary of state.