The good earth: by the numbers.

• Position: TRENDS - Brief article

April 22 marks the 45th anniversary of Earth Day, started in 1970 as a day to appreciate our natural environment. How are we doing?

30%

Americans who describe themselves as "environmentally conscious"

13%

Americans who describe themselves as "green"

1.5 million

Hybrid vehicles sold in the U.S. from 2004 to 2009

46%

Those who say they turn the lights off when they're not needed

42%

Americans who say they recycle

26%

Americans who say they make an effort to use less water

89%

Portion of new single-family homes built with air-conditioning in 2012 (49 percent were in 1973)

0.6%

Portion of workforce who biked to work in 2012

4.43

Average number of pounds of trash each American produces daily, more than 1,500 lbs...