Carbon footprint - Earths Atmosphere

Question 1

What is carbon footprint the measure of?

Answer 1

Amount of carbon dioxide and other greenhouse gases over full life cycle or something.

Question 2

How can carbon footprint be reduced?

Answer 2

Using renewable energy sources.
Using processes that use less energy or produce less waste.
Government could tax based on amount of greenhouse gases someone emits, or put a limit on emissions in gases all companies make.
Technology that catches CO2 before releases.