What's the name fo the device used to absorb heat from outgoing air to minimise heating requirements for a well-sealed house?

In the first table that Rob discusses, it shows the average daily intake is 9700 kJ to maintain minimal activity.  In the table it suggests this is 75-100W.  But how many watt is it precisely (to the nearest W)?

Read this paper on impacts of CO2 on cognitive impacts of elevated CO2

The paper concludes that at high CO2 levels cognitive ability is affected.  At what level what the impact observed?

What are the recent ambient concentrations of CO2?  Look up the March 2021 data from Cape Grim (Tasmania - closest official observing station from Melbourne):

https://www.csiro.au/en/research/natural-environment/atmosphere/latest-greenhouse-gas-data

What is the value (include units)

Demand side management does NOT include:

Lithium ion batteries may be more expensive than PHES, but they have other advantages such as  (which is correct?):

Which of these is a type of chemical battery?

Which of these energy storage technologies used chemical bonds to store energy?

There are a broad range of different technologies for storage energy.  They differ in characteristics including scale, cost and speed of performance.  Energy can be stored using chemical bonds, heat, gravity, pressure and momentum (and others too).

Which form of energy does pumped hydro use?