Question

the builders of a new shopping mall have the option of installing solar panels on the roof of the mall. the solar panels would provide much but not all of the electricity for the malls tenants. although the solar panels have a high purchase of installation cost, they could provide an economic benefit over many years of use.
would choosing the solar panels improve the sustainability of the mall?
yes, b/c using solar energy always improves sustainability regardless of the expense or efficiency
no, b/c the solar panels would meet only part of the electricity needs of the mall
no, b/c the solar panels could provide only a long - term economic benefit, not a short - term benefit
yes, b/c the solar panels have an economic benefit & tap into a renewable energy source

Explanation:

Sustainability involves using resources in a way that meets current needs without compromising future generations. Solar energy is a renewable resource. Even if solar panels don't meet all electricity needs (as in the mall case), tapping into a renewable energy source (solar) contributes to sustainability. The economic benefit (long - term) is also a positive aspect but the key for sustainability is the use of a renewable energy source.

Answer:

yes, b/c the solar panels have an economic benefit & tap into a renewable energy source