Unit 2 - Upper-Int Tenses

His work is important because in some parts of the world they _____(lose) ten percent of forest cover this century.

His Kickstarter campaign ______ (raise) almost 170.000 dollars in 2014.

He _____(invent) a system using old cell phones and solar power to hear the sound of saws and vehicles that illegal loggers use.

Since 2012 he _____(run) a non-profit company.

Topher first _____ (test) the system in Borneo.

In college, he ______(train) as a physicist.

New technology ____(reduce) the barriers since that time.

Since then he _____(work) with groups such as Tembe tribe in South America.

They successfully _____(detect) a lot of illegal activity.

The number of entrepreneurs _____(grow) ever since the arrival of new technologies.