Student Footprints
Students from around the world calculated their class mean and standard deviations for their footprints and posted them on our world map.
Do you see differences across the globe? If so, why do you think those differences exist?
Did you use the calculator to try to reduce your footprint down to the average from a citizen of another country? What changes would you have to make to lower your footprint in this way? Are you going to try and take some of these actions in your daily life?
Student Footprints >
How long do you think it will take for the pH level to be deadly to bigger animal
bigred1e 2015-11-24 09:26:48
diegoo 2015-11-24 10:37:08
Hey bigredle!
It is generally agreed that a change of more than 0.1 is considered dangerous to organisms. It is projected that by 2025 we will have a change of about 0.15
keman15 2015-12-11 08:01:49
I think that by 2023 or 2024, it will change to about 0.15.
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