Here's the real breakdown, according to "The Consumer's Guide to Effective Environmental Choices: Practical Advice from the Union of Concerned Scientists." They analyzed the impacts of 134 different human activities, and these were deemed the most harmful in terms of greenhouse gases, air pollution, water pollution, and habitat alteration.
- Cars and light trucks
- Meat and poultry
- Fruit, vegetables and grains
- Home heating, hot water, and air conditioning
- Household appliances and lighting
- Home construction
- Household water and sewage