Photorespiration is a process that occurs in plants when the enzyme RuBisCO reacts with oxygen instead of carbon dioxide. This typically happens under conditions of high light intensity and low carbon dioxide levels. As a result, the plant produces a compound that is less useful for photosynthesis, leading to a decrease in energy production. During photorespiration, the plant consumes oxygen and releases carbon dioxide, which is the opposite of what happens during normal photosynthesis. This process can reduce the overall efficiency of photosynthesis, making it challenging for plants to thrive in certain environments, particularly in hot and dry conditions.