It is critical because of not only the food production but also the crisis of all living things. It damages the food chain in the sea, and it reduces the haul of fish. It greatly affects the food issue. Long time ago, all of rivers in Japan had been very clear and beautiful. But now, rivers are getting muddy because forests are cut at the upper streams of the rivers, and soils flow into rivers.
Forests create air, store water, and make soils.
However, loss of such forests cause it impossible to store water and create soils. As a result, important soils flows into mountains. The lack of soil reduces harvests, and the flow of soils into seas makes it impossible for fish to live in that water area. Deforestation means not only dynamically change the ecosystem of forest but also the system of ocean. Deforestation is a cause of the food shortage.