For the emerging technologies listed below, discuss whether they will result in any shifting of impacts or in exceeding nature's capacity to supply goods and services. 

1. Electric cars. These cars have no tailpipe emissions and are considered to be pollution-free. 

2. 3D printing. Unlike conventional machining to make a part by removing and wasting the material that is removed, this technology builds a part by constructing layers and reducing waste. 

3. Ionic liquids. These are nonvolatile salts that can replace volatile organic solvents, thus eliminating fugitive emissions.