Lockheed Martin, “the world’s largest defense contractor,” has launched a series of series of initiatives tied to climate change as a potential threat to national security,” reports the Washington Post. The projects range from purifying water and nuclear fusion to “yes, a new environmentally friendly way to farm fish in a cage that drifts off the Hawaiian shore. Chief executive Marillyn Hewson touts the ventures as growth opportunities, a calculated effort to go green at a time when defense spending is shrinking after more than 14 years of sustained warfare.” Lockheed’s contribution toward the “mobile fish pen” include setting up satellite communications and motor controls to track the pen, says the Post.