The head of the Environmental Protection Agency on Thursday appeared to nod to conspiracy theories that have swirled around recent extreme weather events, directing people to the agency’s website for science-based information on geoengineering and contrails.

Administrator Lee Zeldin said Thursday that Americans have “legitimate questions” about airplane contrails as his agency launches webpages aimed at combatting misinformation on the topic. Contrails, the vapor trails that follow high-flying airplanes,