4.1+Modifying+Environments+to+increase+Yields 


 * Scientists and growers have developed technologies that increase the yield of plants. Yield is the**
 * amount of useful plant part per plant. Plants are sometimes grown in artificial environments, in which **** the growing conditions can be controlled. **

On a shared Google Doc Please research links to the following ideas:

1) What are Greenhouses and how do they work to grow plants?

2) What is hydroponics and how does it work?

3) How can indoor gardening produce food?