With that motivation, he decided he wanted to be an environmental engineer, and found himself in the agricultural and biological engineering program at Penn State University, where he focused on soils and water research.
Update april 2016: The top 3 best sold battery powered weed eaters are the: 1) Black & Decker LST136W. 2) GreenWorks 21332 G-MAX. 3) Worx WG175 MAX. As you can see 2 out of 3 are still going strong since 2014, namely the Black & Decker LST136W and the Worx WG175 MAX, see their reviews below.
The power and speed of a gas powered trimmer, but without the hassle! The new cordless 58 Volt Earthwise grass string trimmer is efficient and easy to use - just slide in the rechargeable battery and off you go! Durable yet lighter than most gas powered units, it features a steel shaft, adjustable cutting widths and variable speeds.