expression and writing style "CO2 budget"

[sarahmadeleine]

“CO2e budget” with 2 as subscript

[codingfabi]

Steps needed to be taken to fix this:

• Y axis label in plots should always be “CO2e emissions [kg]” (with 2 as subscript).
• This also applied for the plot legends.

From a technical point, this is not as easy as it sounds because standard string variables in react can not perform formatting. We would need a concept to be able to display such special characters. Some research could be necessary.