1. Single-bin recycling
   Mixed Recycling
2. Single-stream recycling

Being able to put all of your recyclables in one bin is known as single-stream recycling. <a href="http://home.howstuffworks.com/home-improvement/energy-efficiency/green-home.htm">5 Ways to Greenify Your Home</a>

1. Recycled water
   Gray water
2. Dish water

Gray water is the term used for household water that has been captured and reused. <a href="http://home.howstuffworks.com/home-improvement/energy-efficiency/green-home.htm">5 Ways to Greenify Your Home</a>

1. 75 percent
   85 percent
2. 95 percent

A USDA "organic" seal means that at least 95 percent of the ingredients are organic by the USDA's standards. <a href="http://home.howstuffworks.com/home-improvement/energy-efficiency/green-home.htm">5 Ways to Greenify Your Home</a>

1. Illinois
   Washington
2. California

Illinois has not developed its own organic standards or label guidelines. <a href="http://home.howstuffworks.com/home-improvement/energy-efficiency/green-home.htm">5 Ways to Greenify Your Home</a>

1. 1977
   1990
2. 2001

The U.S. Department of Agriculture launched its National Organic Program in 1990. <a href="http://home.howstuffworks.com/home-improvement/energy-efficiency/green-home.htm">5 Ways to Greenify Your Home</a>

1. R-35
   G-10
2. R-85

A R-85 insulation rating would be mean the insulation is quite thick and protective. <a href="http://home.howstuffworks.com/home-improvement/energy-efficiency/green-home.htm">5 Ways to Greenify Your Home</a>

1. 4
   6
2. 8

The EPA suggests that you set your thermostat to a difference of 8 degrees when you leave your house and 4 degrees when you sleep. <a href="http://home.howstuffworks.com/home-improvement/energy-efficiency/green-home.htm">5 Ways to Greenify Your Home</a>

1. 1-2 percent
   4-8 percent
2. 5-10 percent

Every degree that your home's thermostat is raised in the summer saves 4-8 percent on the cost of cooling your house. <a href="http://home.howstuffworks.com/home-improvement/energy-efficiency/green-home.htm">5 Ways to Greenify Your Home</a>

1. 3 percent
   5 percent
2. 10 percent

Properly sealing your home can save you 10 percent annually on heating and cooling. <a href="http://home.howstuffworks.com/home-improvement/energy-efficiency/green-home.htm">5 Ways to Greenify Your Home</a>

1. Burning gasoline
   Hydropower
2. Burning coal

In the United States, about 50 percent of all electricity is produced by burning coal. <a href="http://home.howstuffworks.com/home-improvement/energy-efficiency/green-home.htm">5 Ways to Greenify Your Home</a>