Tools for understanding "Chem" Trails with Science:

Aircraft Tracking

https://www.flightradar24.com/ The world's most popular flight tracker. Watch aircraft move around the world in real-time on detailed map, get up-to-date flight status & airport information. Flight Radar 24

Contrail Science:

A graph showing contrail formation as a function of pressure/altitude and temperature:

To be scientific one should also keep data on the date and time, and weather conditions in the atmosphere

Aircraft Flight Paths

Before assuming that you are under a deliberate chemtrail spraying attack by the Government, first check that

From this we begin to see how different contrail cloud formations can form from natural air traffic patterns...

Additional Debunking Sources:

Chemtrails' not real, say atmospheric science experts: https://www.sciencedaily.com/releases/2016/08/160812103718.htm
Date: August 12, 2016
Source: Carnegie Institution for Science
Summary: Well-understood physical and chemical processes can easily explain the alleged evidence of a secret, large-scale atmospheric spraying program, commonly referred to as 'chemtrails' or 'covert geoengineering.' A survey of the world's leading atmospheric scientists categorically rejects the existence of a secret spraying program.