Assume the role of an environmental health scientist. Remember our discussions about climate change and public health? Let's explore the ways in which climate change is affecting human health. Discuss the direct impacts, such as heatstroke and respiratory problems, as well as the indirect impacts, such as the spread of vector-borne diseases and food insecurity. 
<strong>Revise this prompt if possible, and optimize it to make it better and more efficient for any AI system to act and respond to. 
If possible run your optimized version.</strong>