A thorough analysis of a timely and important topic. The author is an environmental writer who has produced this interesting volume on the history and importance of shade its impact on people’s health. Historically shade was engineered into the planning of towns and cities. If we think of the narrow streets of warm weather countries like Spain and Mexico, the narrow streets provide a lot of shade for people in the street during the day when they don’t want to be exposed to the blazing sun. Also, and abundance of trees on streets and in public places like parks providing cooling shades for people walking or hanging out. Several factors have influenced the disappearance of shade as a standard feature of cities, first air conditioning has replaced the need for shade, but this also has had social implications. Instead of hanging out on our shaded front porches and under a tree, we are now all inside and not mingling with our neighbors and socializing. Also in urban settings, law enforcement has suppressed the planting of trees and encouraged their removal as the block the ability of provide surveillance of an area and they provide cover for the ‘bad guys’.
This book could also have been titled ‘Heat’. The author spends a lot of time illustrating the health affects of excessive heat, particularly on people who spend a lot of time out of doors, such as agricultural workers and the homeless. The ill affect of excessive heat becomes exaggerated in the elderly. With the warming of the planet places that were typically very temperate all of a sudden find that they have to deal with excessive heat. Many homes and businesses in these areas do not have air conditioning because they never needed it. This now puts an economic strain on communities and individuals who have to have AC installed and who have to pay for the electricity to operate it.
There are also societal implications to excessive heat, people are much more likely to get angry during heat waves. As the author points out “Heat is an irritant that makes us angrier, more aggressive, and even more vengeful. It can override more rational thoughts.”
