Effects of UHI on the economy​

The economic cost of increased energy demand in the warmer months is offset by the benefits of reduced energy demand due to warmer condition that the UHI creates during colder winter months. The total economic cost to the community due to hot weather is estimated to be approximately $1.8 billion in present value terms.

d. new methods of assembly are introduced.

explanation:

this allows for the goods to be made on a larger scale. not faster because now it is shown to be made better, hence the greater productivity in the question. it is calling for something new to be introduced.