Question 2 of 21

How much weight does the average person lose during their first year of biking to work?

... Biking to work not only helps to cut fossil fuel consumption and air pollution, it can also help you trim your waistline. People who stop driving to work and take up biking can lose an average of 13 pounds in their first year.

Question 3 of 21

Does obesity run in your family? A one-hour daily walk can decrease the influence of obesity genes by this amount.

... Just 60 minutes of walking each day cuts your genetic influence towards obesity by 50 percent -- one more good reason to ditch your car in favor of your feet.

Question 4 of 21

Fact or fiction: Exposure to natural light can boost your productivity and mood.

... Fact: Natural daylighting not only helps eliminate your need for electricity, but studies show it also boosts your spirits and may help you accomplish more throughout your day.

Question 5 of 21

Making a new aluminum can uses this much more energy than recycling one.

... It takes 95 percent less energy to recycle a can than it does to make a new one. Recycle household waste to cut energy use and help clean up the air.

Question 6 of 21

To protect the planet and your heart, which of these should you try to limit your consumption of?

... That yummy steak has a heck of a carbon footprint. Meat requires a large amount of land, water and energy to produce. Eating less meat not only helps the environment -- it also cuts your risk of heart attack, stroke and cancer.

Question 7 of 21

Fact or fiction: Many common household cleaning products contribute to allergies, birth defects and cancer.

... Fact: Many household cleaning products contain harmful chemicals that can cause health problems -- especially in poorly ventilated areas. Protect your family and the earth with eco-friendly alternatives made from natural products like lemon juice and vinegar.

Question 8 of 21

Fact or fiction: Real scientific studies have shown that access to nature and "green" spaces improves social, emotional and cognitive health.

... Fact: People who spend time in the great outdoors enjoy significant health benefits compared to those in tree-free urban areas.

Question 9 of 21

What percent of the average American family budget does transportation account for?

... Transportation makes up 20 percent of the average American family budget. Save money and keep fit by biking or walking whenever possible.

Question 10 of 21

More than 15 percent of asthma cases are caused by this.

... Living near a busy road is a leading cause of asthma. Help everyone breathe easier by greening your transportation.

Question 11 of 21

According to the IPCC, what percentage of the world's greenhouse gas emissions came from transportation in 2004?

... In 2004, 13 percent of all the world's greenhouse gas emissions came from transportation. Take public transit to fight global warming and help decrease air and water pollution -- or better yet, walk, run or bike to do the same while improving your own cardiovascular health.

Question 12 of 21

Fact or fiction: You are more likely to breathe unhealthy volatile organic compounds (VOCs) outside your home than inside it.

... Fact: According to the EPA, the air inside of the home contains two to five times the level of organic compounds found outdoors. Choose low-VOC paints and other building materials to improve air quality in your home.

Question 13 of 21

Fact or fiction: Using compact fluorescent lamps (CFLs) results in greater mercury emissions than using incandescent lightbulbs.

... Fiction: Because CFLs are vastly more efficient when compared to incandescent bulbs, they result in a significant reduction in mercury emissions

Question 14 of 21

Fact or fiction: Most heating and cooling systems provide sufficient ventilation to allow for healthy indoor air quality.

... Fiction: Mechanical heating and cooling systems not only use energy, they also provide too little fresh air to keep a home healthy. Go green and save money by opening a window instead of switching on the air conditioner.

Question 15 of 21

How much can shade reduce air temperature?

... Planting trees or adding other shading devices around your home can reduce the air temperature by 5 to 8 degrees Fahrenheit. You'll stay more comfortable and cut cooling costs and related emissions.

Question 16 of 21

Fact or fiction: A single tree supplies enough oxygen each year to support two humans.

... Fact: Planting trees helps to neutralize carbon emissions and clean the air. In fact, a single mature tree supplies enough breathable air to meet the needs of two people.

Question 17 of 21

Fact or fiction: Buying organic produce helps reduce the impact of chemical pesticides, resulting in cleaner air and water.

... Fact: Organic food is grown without the use of pesticides, making it a healthier choice for the environment. Choosing foods that are free of pesticides can also cut your risk of cancer.

Question 18 of 21

Fact or fiction: Fruits and veggies at the supermarket travel an average of 1,500 miles (2,414 kilometers) from farm to store.

... The 1,500-mile journey your produce takes to the market results in fossil fuel consumption, which contributes to air and water pollution. Look for local farmers markets for a greener alternative. Local produce tends to be fresher anyway.

Question 19 of 21

Fact or fiction: Organic food is scientifically proven to provide better nutrition than regular, non-organic food.

... Fiction: According to the National Institutes of Health, there is no solid evidence that organic food provides better nutrition than regular, non-organic food. It is, however, better for the environment and more likely to be free of pesticides.

Question 20 of 21

Which city leads the nation in bicycle commuting?

... Portland leads the nation in commutes by bicycle. The city expects to realize nearly $400 million in healthcare savings by 2040 thanks to this trend.

Question 21 of 21

What percent of car trips in the U.S. are shorter than 2 miles (3.2 kilometers)?

... Almost three-quarters of all car trips in the U.S. are shorter than 2 miles. Walking this distance instead of driving helps to reduce bad cholesterol levels while increasing good ones.

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