Chemtrails or contrails (condensation trails)? Conspiracy theory or simple coincidence? White streaks crisscross our blue skies, every day. Who is behind them, and why? Some claim that these are responsible for respiratory illnesses from toxic chemicals, weather modification, and global warming. We invite the general public to examine the evidence collected by experts in wide-ranging fields, from climate change to geoengineering. Explore what is really going on.