what is the definition of locomotion

According to bestseller book Occupational Therapy and Mental Health, author J Creek shows that approximately 27% of most Europeans are afflicted by some form of mental illness, almost 45% to 75% with moderate to severe physical illness and approximately 35% to 45% from some sort of psychiatric disorders like anxiety or depression that need adjustments to the approach to life and occupational activities. Occupational treatments are apparently a self explanatory term quite a few people have an obvious misconception about the benefits, likely candidates and uses of occupational therapy. When tractors were first developed, they used enormous steam engines that were notoriously unreliable and hard to maintain. These were phased out around the turn with the twentieth century and substituted for internal combustion engines which were smaller though powerful and ran on a number of fuels including kerosene, ethanol and gasoline. By the 1960s several of these engines were phased out and only more effective internal combustion engines that ran on diesel and after this, biodiesel.