Plug-in hybrids run for a longer time on electricity and so are less polluting than regular hybrids. Would a diesel powered submarine release more pollution if it were running on its diesel engine or its battery backup power??
its diesel engine

The longer the exposure, the more light that the telescope can gather to make the image. Mike needed to get a good picture in a dark room, but couldn't turn on a light. In order to get the brightest photo, Mike made the exposure longer or shorter?
longer

Q: Increased resource use generally means more waste; electronic waste from developed nations is a growing problem in the developing world. Wendy lives in a country that uses few resources. Which is likely true about the amount of waste produced compared to a developing country it is more or it is less?
A: it is less

Question: For a given medium, sound waves travel more slowly at lower temperatures. When it is very cold what happens to the speed of items speed up or slow down?
Answer: slow down

*Question*
A decrease in greenhouse gas levels decreases global temperature and an increase raises global temperature. If Mona's country normally emits a lot of greenhouse gas, but one day decides to lower the amount they emit, what will happen to the global temperature increase or decrease?
**Answer**
decrease

(Q).
Many of the worlds people live with water scarcity, and that percentage will increase as populations increase and climate changes. The population in Milo's city has been decreasing recently. What will happen to the city's level of water scarcity decrease or increase?
(A).
decrease