fromEnglish Grammar Today
Economicandeconomicalare adjectives.
We useeconomicto mean ‘related to trade, industry or money’:
Theeconomicforecast for next year is not good.
The President spoke mostly abouteconomicpolicy.
We useeconomicalto mean ‘not using a lot of money’:
Hybrid cars are veryeconomical.(They do not cost a lot of money to run.)
Solar energy for your home is expensive in the short term but it is moreeconomicalin the long term.