Martin and Emma live in a town that has bus lanes. Only buses can drive in bus lanes.

This means that at busy times buses travel faster than cars.
Buses and cars make carbon dioxide and other pollutants when they burn fuel.
Martin says there will be less air pollution as more people will travel by bus.
Emma says there will be more air pollution as a bus burns more fuel than a car.
Who is correct and why?

For the strategies below, decide whether they are best described as demand-side solutions or supply-side solutions to meeting human needs for fresh water. remember that a demand-side solution reduces demand for fresh water, whereas a supply-side solution increases the supply of fresh water. (a) damming a river to create a reservoir (b) desalinating seawater (c) a nation invading a neighboring country to access their rivers (d) raising water prices for consumers and businesses (e) providing tax breaks for companies that use less water (f) replacing inefficient irrigation with more-efficient drip irrigation to grow crops (g) requiring low-flow showerheads in all new homes