Look at the sky above you. Are those long, glittering clouds actually part of a government experiment to poison you? If you believe in chemtrails — a conspiracy theory that's spawned a political movement — then yes. If you believe in science, not so much.
Sometimes you don't need to look through a telescope to see something beautiful in the sky. This image of contrail shadows, taken by Jeff Ross-Bain at Atlanta, Georgia, USA, is a great example. [Atmospheric Optics]
According to scientists, climate change is real. Humans have, are and will continue to affect this planet's weather with their CO2 shenanigans. This includes WW2, where there was a demonstrable human-created invention that had a measurable impact on the weather.