Analysts of geoengineering challenge the inevitability of millenniums of warming.
Neil deGrasse Tyson and Al Gore talk about climate change activism, the “GoreSat” satellite, “spider goats” and paths to abundant clean energy.
A pioneering effort to fly a solar-powered aircraft around the world makes a high-profile stop in the city that never sleeps.
Can an international gathering in San Francisco take big greenhouse-gas emitters from ambitious clean-energy pledges to real-world action?
Two young energy analysts offer a path past the tangled debates over how much to invest in deploying today’s renewable-energy technologies and tomorrow’s breakthroughs.
Bill Gates discusses the investment and research efforts he’s pursuing to energize societies without overheating the climate.
Bill Gates replies to questions from Times readers on meat, gas guzzling, overcoming the vast oil industry and more.