Reversing Desertification?

It is claimed the Sinai Peninsula was once green. The Weather Makers is a group of 'holistic engineers' hoping to restore this desert location in Egypt (https://www.theguardian.com/environment/2021/mar/20/our-biggest-challenge-lack-of-imagination-the-scientists-turning-the-desert-green). The Weather Makers are a primarily Dutch group, who were initially concerned with eco-friendly dredging. They were given the task of improving the waters of Lake Bardawil, by increasing the flow of seawater into it from the Mediterranean. The Weather Makers want to go much further and restore the wetlands around the lake. They hope to do this by using eco-machines. Eco-machines (tested in the Netherlands, where conditions are rather different) are low-tech installations. They consist of clear-sided water barrels, covered by greenhouses. The eco-machines enable a range of plants and invertebrates to become established in the location. The organisms become progressively more complex as the systems mature. The idea is that the presence of wetlands, enables the atmosphere to absorb more water. This increases the probability of rainfall inland. This is the opposite of what has happened elsewhere (e.g. Spain), where wetlands were drained, to create more agricultural land. This resulted in reduced rainfall inland, eventually causing agricultural failures. If the Sinai could be greened and reforested, this would help counter climate change. The plants (especially if trees could be grown) would become a new carbon sink. It's a nice idea, but ecosystems are complicated things. Weather changes in one area, might have detrimental effects in other locations. So, changes would have to be monitored over a large area. Many of the world's deserts have, however, been 'aided and abetted' by inappropriate human activities. In climate and biodiversity terms, deserts can be something of a waste of space. Limiting desertification is a valid aim. Give it a try!