Inglês — figuras de linguagem

Green is the hot topic these days, and the concept is having an impact on the way people think about datacenters. Companies around the world are announcing ways to save energy and reduce costs by5 buying new hardware and services. Yet, there is little guidance on how you can take action to control energy costs. In the past, electricity has been treated as an overhead expense, like the cost of space. But with rising power costs and issues regarding reliability, supply, and10 capacity, electricity requires its own specific strategy. Projects regarding performance optimization and cost reduction are a part of everyday best practices

The correct opposites for the words hot (line 1) and wasteful (line 27) as they are used in the text are, respectively: