Libertarian presidential candidate Gary Johnson has pulled back his support for a tax on carbon dioxide emissions after just three...

President Obama has twice stymied programs initiated during the Bush administration designed to take humans to Mars by leaking information...

Who would have thought that biofuels such as ethanol and biodiesel emit more greenhouse gas – specifically heat-trapping carbon dioxide...

We are bombarded with claims that some month or year (e.g., 2016) is the "warmest ever." But what does that...

The sea ice in the Arctic Ocean is approaching its annual nadir. By early September each year about two-thirds of...