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In college, he ______(train) as a physicist.
trained
Since 2012 he _____(run) a non-profit company.
has been running
He _____(invent) a system using old cell phones and solar power to hear the sound of saws and vehicles that illegal loggers use.
has invented
Topher first _____ (test) the system in Borneo.
tested
Since then he _____(work) with groups such as Tembe tribe in South America.
has been working
They successfully _____(detect) a lot of illegal activity.
have detected
His work is important because in some parts of the world they _____(lose) ten percent of forest cover this century.
have lost
His Kickstarter campaign ______ (raise) almost 170.000 dollars in 2014.
raised
The number of entrepreneurs _____(grow) ever since the arrival of new technologies.
has been growing
New technology ____(reduce) the barriers since that time.
has reduced
