On average a home in Salt Lake produces 48 tons of CO2 per year. If you turn your thermostat down two degrees you save 6% on your bill and also emit 6% less CO2. This means that you could reduce your emissions by 3 tons over the course of a year. (Based on averages calculated via http://www.cleanairtrust.org/calculator).
The scale is based on the U.S. vehicle emissions standards, which incorporate specific thresholds for nitrogen oxide, non-methane organic gas, carbon monoxide, particulate matter, and formaldehyde. For those vehicles that run on electricity, the tailpipe emissions are zero. For more information visit http://www.fueleconomy.gov/feg/label/learn-more-gasoline-label.shtml
New research has shown that burning wood, either in a fireplace or in a wood burning stove used for heating a house, is 3,000 times more polluting than heating with natural gas.
Chaining your trips together not only makes sense but it pollutes less. Your car's catalytic converter reduces your tailpipe emissions. In order for catalytic converters to run properly they need to be warm. The fewer times you start your car after the engine cools down, the better your catalytic converter works.
Taking the bus, light rail, or other public transportation means fewer cars on the road and less pollution. Talk with your employer and let them know that you are using public transit. They may offer discounted passes or be flexible with your schedule.