Yes chemtrailing, or geoengineering as they call it, is and has been happening for years. Now Harvard University is coming out and saying, we are going to spray the sky with aerosols like aluminum, barium, strontium to "save the planet". Isn't it odd that they are announcing that are going to do what chemtrailing truthers have been saying they are doing for years. Also these chemicals are not safe for humans to inhale and ingest. sigh... I strongly recommend the new documentary Frankenskies by Matt Landman, he really lays out the history and truths of geoengineering.
The fact that people in the mainstream are coming out and talking about this suggests to me that this information will soon be made public. How, I'm not sure. I can already hear the deniers turned supporters "They are spraying to save us! And they haven't been doing it all these years, they told us it just started! All those other ones were just contrails back then."