This petition was rejected

The Government e-Petitions Team gave the following reason:

Petitions need to call on the Government or Parliament to take a specific action.

There are already controls in place for aerial spraying, so we're not sure exactly what you'd like the Government or Parliament to do.

You can find out more about aerial spraying here:

http://www.hse.gov.uk/pesticides/topics/using-pesticides/general/aerial-spraying.htm

In response to a question in Parliament about "chemtrails" the then Minister replied:

"The Department is not researching into chemtrails from aircraft as they are not scientifically recognised phenomena. However, condensation trails (contrails) are known to exist and have been documented since the 1940s. Contrails are composed of ice crystals forming on the small particles and water vapour emitted by aircraft as the result of the combustion process, they form behind high-flying aircraft depending on the temperature and humidity of the atmosphere.

A major scientific report, Aviation and the Global Atmosphere", was published in 1999 by the Intergovernmental Panel on Climate Change. The report assessed the current contribution of aviation to climate change and, based on a range of scenarios and assumptions, forecast its contribution up to 2050. It estimated that contrails covered about 0.1 per cent. of the Earth's surface in 1992 and projected this cover would grow to 0.5 per cent. by 2050 (on middle range assumptions). More recently this work has been updated from the results of the EU 5th Framework Project, TRADEOFF.

Contrails continue to be the subject of research to help better understand both how they are formed and what effects they have on the atmosphere."

publications.parliament.uk/pa/cm200506/cmhansrd/vo051108/text/51108w11.htm

You could start a new petition explaining clearly what you would like the Government or Parliament to do.