Date and Time
Wed, Jan 27 2021, 4pm
Addressing climate change may be the greatest environmental challenge of the century, affecting everyone in the world, but most of us have only a limited understanding of how our own personal activities translate into energy consumption and CO2 emissions. Part of the challenge is that energy is expressed in so many different units that it is difficult to add them up to determine energy use for our daily lives. For example, food is reported in energy units of Calories or megajoules, driving our car is evaluated by fuel use in gallons or liters, our home electric bills are listed kilowatt hours (kWh), and natural gas heating in CCF or therms. How much energy do you use? As a scientist or engineer, you could calculate your energy use in one specific energy unit, but how would you interpret the results? For example, the US annually uses about 100 quads of energy but how does that compare to your own energy use? In this talk, Dr. Logan introduces the concept of the energy unit D and a CO2 emission unit of C and explore daily energy use and how these activities lead to CO2 emissions. If we define 1 D as the energy in food that you eat every day (2000 Calories), then all energy use can be compared to this number in units of D. Some comparisons will surprise you. For example, would you predict a car on average in the US uses more energy than a house? For CO2 emissions, each person emits about 2 lb/d (defined as 1 C) due to the food we eat. Therefore, we can compare CO2 emitted from a gallon of gasoline or electricity used for our home relative to our personal minimum (CO2 emissions from the food we eat). After this lecture, it is hoped that you will view your lifestyles and energy choices with greater clarity as that is needed for us all to address energy use and CO2 emissions, and therefore climate change.