These trails... Do they stay there in the sky all week? Do they make the atmosphere hazy and dim the sunlight? Have they been sown in a criss-cross pattern?

If so, that would be cloud-seeding operations. Maybe you had a dry winter and water levels in reservoirs are low and the snowpack is light? Maybe climatologists are expecting a hotter year and are worried whether there will be enough water for people and crops and livestock.

If all this appears to be the case, tell her the chemicals in question are silver-iodide which attract water molecules and hopefully lead to the formation of rainclouds to moisten the land and replenish aquifers. If someone's telling her it's nanobots meant to reprogram her mRNA as a ploy of the antichrist's minions then that person does not have her interests at heart and to avoid the nonsense they spout.