v0.17.1 has just been released, with some key gameplay changes:

You can now choose to sample more than one data type at a time, but the sampling goes round-robin, so if you choose to sample 3 data types, it will take 3 times longer before chemicals are released.

Tornadoes still respond to chemicals differently. Originally for each tornado, a pre-determined random response % would be calculated. This would then be the exact same % you would see every time chemicals are released. Now, for each tornado, a randomised minimum and maximum are determined for each response. So you will see different % responses within a pre-randomised range, just to keep things interesting.

The data UI has been redone, and you can choose what you're sampling from the data page, so you don't have to stop your truck and get out just to change data types.

Enjoy! :)