Of course, there are also disadvantages. This is why vertical agriculture has not yet become commonplace, despite promising year-on-year growth rates of more than 25%. First of all, the high energy consumption is necessary to create the ideal growing environment for the crops. Furthermore, there are major investments involved in the design of this ‘urban agriculture’ and the production costs are high. Also, not every crop can be grown indoors with equal success. Leafy vegetables, herbs, tomatoes and strawberries seem to thrive in such a controlled environment, while crops such as wheat and potatoes are much more difficult to grow.

The FAO expects 70% of the world’s population to live in cities by 2050. To what extent the recent COVID-19 pandemic will affect these figures is the question, now that the concept of ‘space’ and ‘qualitative living environment’ have taken on a new dimension for many. But overall this figure will be correct. Food security and constant supplies of food are extremely important. For corona, we were barely aware of this. The supermarkets were full of all kinds of food that we needed and often didn’t need. But the tide has turned. As a world, we are pressed on the facts; we have less control over our lives than we thought. And that also applies to the basic necessity of our daily food. In the Netherlands we have little to fear, we can meet this need for food and even have a food surplus that we export. But in other countries this situation is very different, where people depend on food imports. This gives a direct boost to the development of vertical agriculture. Urban agriculture seems to have a future, as it answers important issues such as food security, scarce resources, food price inflation and sustainability. These prospects attract investors, who will further increase the already high growth expectations. The lettuce plants grown indoors will grow to the sky.