Only excellent understanding is the basis of directed development and acceptance and trust by the public. Very few people know how to calculate the statics of a bridge or can explain why a 300-ton airplane can fly, but there is huge trust in the engineers that their models are good enough for the real things to last and fly. Even while seeing that many more or less rationalised arguments against chemical engineered plants are really far away from any scientific basis, scientists need to understand the public’s mistrust against the results of plant engineering. One point may be that plant science has not yet been able to communicate (or possess) a broad based theory and a set of widely accepted and proven models to describe what is actually going on. Engineers and physicists have showed massive proof of concept by bringing man to the moon, probes to the mars and building reliable airplanes and bridges.