Which book is often referred to as the one having the most worldwide influence on conservation?

Many avid gardeners do what to save water?

Since the 1970s, the temperature of the Earth's surface has risen by how much?

Running water for 6 minutes is equivalent to using a 60-watt light bulb for how long?

An average bath takes how much water?

How many millions of gallons of gas are saved each year by people taking public transportation instead of driving?

A front-loading washing machine usually uses about how much water per load?

Keeping the door to your fridge open every day for a year is equivalent to what?

The Rachel Carson book, 'Silent Spring' argued against the spraying of what in the United States?

How many millions of gallons of gas are saved each year by people taking public transportation instead of driving?

An average bath takes how much water?