…but I’m not stupid either.
The environment and, more specifically, climate change are among the greatest challenges we face in the world (right up there with economic challenges, political instability, health, safety, and social inequality). It’s no surprise, if we consider the growth of the world’s population over the past hundred years [1927 = 2 billion, 1960 = 3 billion, 1987 = 5 billion, 2015 = 7 billion, and 2050 = 9 billion] and the consequent advances in industrialization to provide for prosperity, comfort and convenience.
Today, approximately 3.5 billion people (~ 50% of world population) live in cities and this is expected to double by 2050. Our cities occupy a small 2% of land but contribute 70% of greenhouse gas (GHG) emissions. The buildings in our cities consume more than 40% of our energy and, in general, popular consensus agrees that at least 30% of this is wasted.
Carbon Dioxide (Co2) accounts for more than 76% of GHG emissions and the remainder consists of methane (51% of which is being produced by cows), nitrous oxide (e.g. fertilizer), and fluorinated gases (e.g. refrigeration). Of all greenhouse gas emissions, 35% is generated by the energy sector, 21% by industry, 14% by transportation, and 24% by agriculture and forestry. Continue reading