Last year, the Global Forest Watch tracking system starting allowing people to help monitor deforestation in far-flung parts of the world while sitting at home with their laptop. But the satellite program had a flaw: perpetrators could hide behind cloud cover. The system recently announced a new upgrade that uses radar to see right through the clouds. “Essentially, the satellites are sending radio waves to Earth and collecting how they come back,” said Mikaela Weisse, one of site administrators, as reported by NPR.